托福听力TPO14原文Lecture4
托福听力tpo46 lecture1、2、3、4 原文+题目+答案+译文
托福听力tpo46lecture1、2、3、4原文+题目+答案+译文Lecture1 (2)原文 (2)题目 (4)答案 (6)译文 (6)Lecture2 (8)原文 (8)题目 (10)答案 (12)译文 (12)Lecture3 (14)原文 (14)题目 (16)答案 (18)译文 (18)Lecture4 (19)原文 (19)题目 (22)答案 (24)译文 (24)Lecture1原文NARRATOR:Listen to part of a lecture in a biology class.FEMALE PROFESSOR:I'd like to continue our discussion of animal behavior and start off today's class by focusing on a concept we haven't yet touched upon—swarm intelligence.Swarm intelligence is a collective behavior that emerges from a group of animals,like a colony of termites,a school of fish,or a flock of birds.Let's first consider the principles behind swarm intelligence,and we'll use the ant as our model.Now,an ant on its own is not that smart.When you have a group of ants,however, there you have efficiency in action.You see,there's no leader running an ant colony. Each individual,each individual ant operates by instinctively following a simple set of rules when foraging for food.Rule number1:Deposit a chemical marker…called a pheromone.And rule2:Follow the strongest pheromone path.The strongest pheromone path is advantageous to ants seeking food.So,for example,when ants leave the nest,they deposit a pheromone trail along the route they take.If they find food,they return to the nest on the same path and the pheromone trail gets stronger—it's doubled in strength.Because an ant that took a shorter path returns first,its pheromone trail is stronger,and other ants will follow it, according to rule2.And as more ants travel that path,the pheromone trail gets even stronger.So,what's happening here?Each ant follows two very basic rules,and each ant acts on information it finds in its immediate local environment.And it's important to note: Even though none of the individual ants is aware of the bigger plan,they collectively choose the shortest path between the nest and a food source because it's the most reinforced path.By the way,a-a few of you have asked me about the relevance of what we're studying to everyday life.And swarm intelligence offers several good examples of how concepts in biology can be applied to other fields.Well,businesses have been able to use this approach of following simple rules when designing complex systems,for instance,in telephone networks.When a call is placed from one city to another,it has to connect through a number of nodes along the way.At each point,a decision has to be made:Which direction does the call go from here?Well,a computer program was developed to answer this question based on rules that are similar to the ones that ants use to find food.Remember,individual ants deposit pheromones,and they follow the path that is most reinforced.Now,in the phone network,a computer monitors the connection speed of each path, and identifies the paths that are currently the fastest—the least crowded parts of the network.And this information,converted into a numeric code,is deposited at the network nodes.This reinforces the paths that are least crowded at the moment. The rule the telephone network follows is to always select the path that is most reinforced.So,similar to the ant's behavior,at each intermediate node,the call follows the path that is most reinforced.This leads to an outcome which is beneficial to the network as a whole,and calls get through faster.But getting back to animal behavior,another example of swarm intelligence is the way flocks of birds are able to fly together so cohesively.How do they coordinate their movements and know where they're supposed to be?Well,it basically boils down to three rules that each bird seems to follow.Rule1:Stay close to nearby birds.Rule2:Avoid collision with nearby birds.And rule3:Move in the average speed and direction of nearby birds.Oh,and by the way,if you're wondering how this approach can be of practical use for humans:The movie industry had been trying to create computer-generated flocks of birds in movie scenes.The question was how to do it easily on a large scale?A researcher used these threerules in a computer graphics program,and it worked!There have also been attempts to create computer-generated crowds of people using this bird flocking model of swarm intelligence.However,I'm not surprised that more research is needed.The three rules I mentioned might be great for bird simulations,but they don't take into account the complexity and unpredictability of human behavior.So,if you want to create crowds of people in a realistic way,that computer model might be too limited.题目1.What is the lecture mainly about?A.Various methods that ants use to locate foodB.A collective behavior common to humans and animalsC.A type of animal behavior and its application by humansD.Strategies that flocks of birds use to stay in formation2.According to the professor,what behavior plays an important role in the way ants obtain food?A.Ants usually take a different path when they return to their nest.B.Ants leave chemical trails when they are outside the nest.C.Small groups of ants search in different locations.D.Ants leave pieces of food along the path as markers.3.What are two principles of swarm intelligence based on the ant example?[Click on2answers.]A.Individuals are aware of the group goal.B.Individuals act on information in their local environment.C.Individuals follow a leader's guidance.D.Individuals instinctively follow a set of rules.4.According to the professor,what path is followed by both telephone calls on a network and ants seeking food?A.The path with the least amount of activityB.The most crowded pathC.The path that is most reinforcedD.The path that has intermediate stopping points5.Why does the professor mention movies?A.To identify movie scenes with computer-simulated flocks of birdsB.To identify a good source of information about swarm intelligenceC.To emphasize how difficult it still is to simulate bird flightD.To explain that some special effects in movies are based on swarm intelligence6.What is the professor's attitude about attempts to create computer-generated crowds of people?A.She believes that the rules of birds'flocking behavior do not apply to group behavior in humans.B.She thinks that crowd scenes could be improved by using the behavior of ant colonies as a model.C.She is surprised by how realistic the computer-generated crowds are.D.She is impressed that computer graphics can create such a wide range of emotions.答案C B BD C D A译文下面听一段生物学讲座的片段。
托福TPO14口语Task4阅读文本+听力文本+题目+满分范文
为了帮助大家高效备考托福，为大家带来托福TPO14口语Task4阅读文本+听力文本+题目+满分范文，希望对大家备考有所帮助。
托福TPO14口语Task4阅读文本： Comfort Zone Bias Psychologists have found that when people make important decisions, they often choose to stay in their “comfort zones”, that is, they prefer remaining in comfortable, familiar situations, rather than entering into new, unfamiliar ones. This tendency is often referred to as the comfort zone bias. When people are reasonable content, they often decide not to pursue a new opportunity, even if it attracts them and offers more advantages. Psychologists believe that the comfort zone bias exists not only because we have a natural preference for what we already know, but also because we want to avoid taking risks. 托福TPO14口语Task4听力文本： Now listen to part of a lecture in a psychology class. (male professor) OK, so this comes up a lot when people make career decisions.A friend of mine from college always wanted to be a film reviewer. He was a film major and he loved movies. Most of all, he loved to write about movies. So, when he graduated, he looked for a job as a film reviewer for a newspaper, because as a film reviewer, he gets to see films for free and would be paid to write about them.That's what he loved! But, he couldn't find the job as a film reviewer. So, he took a position as a news reporter instead, for a newspaper, investigating stories, writing about events, what news reporters do.Now, at first, my friend wasn't sure if he'd be any good at this. He'd never been as a news reporter before. But, eventually, he adjusted and gained confidence and he got used to the job. And he realized he was actually a pretty good reporter.Anyway, here's the thing: after a few years, the film reviewer for the paper where he worked quit, and my friend was offered her job. This was his dream, right? Here’s opportunity to be a film reviewer had finally come! And the new job would actually pay more, too.But, did he take the job? No! He turned it down. He told me he’d gotten used to being a news reporter and he just didn't want to try something else. It seemed like too big a change, since, well, there was a chance the new job might not work out. 托福TPO14口语Task4题目： Using the example from the lecture, explain the comport zone bias. 托福TPO14口语Task4满分范文： When making important decisions, people prefer to remain in familiar situations that make them feel comfortable and give up new opportunities. This tendency is called comfort zone bias. And the professor takes his friend's experience. One of his friends in college was a film major who was crazy about films. However, he couldn't find a job as a film reviewer, so he became a news reporter instead. It wasn't easy for him to become a journalist at first, but when he adapted himself to the job, he realized that he was actually good at it, and therefore a job reporter became his comfort zone. So later even when he was offered the position of a film reviewer, he declined it because of his bias toward his reporter job. (181 words) 以上是给大家整理的托福TPO14口语Task4阅读文本+听力文本+题目+满分范文，希望对你有所帮助!。
托福听力真题及答案
托福听⼒真题及答案托福听⼒是⼀种对考⽣听⼒的考核⽅式。
是⼀般是两到三个部分，每个部分由⼀段对话和两个讲座，每个部分需要听的录⾳⼤约是20分钟，答题时间是10分钟，下⾯是⼩编收集推荐的托福听⼒真题，仅供参考，欢迎阅读。
2015年10⽉11⽇托福听⼒真题讲座1 哲学holism和reductionism的区别(两个学术研究的不同⾓度)⽤ants举例，先说D：每个ant有⾃⼰的task，每个⼩的part都发挥⾃⼰的作⽤。
教授下结论，看了individual的作⽤可以predict整体的作⽤。
再说H：解释整体的作⽤并不单纯个体作⽤的叠加，类似1+1>2。
即整体作⽤更⼤。
提到leader的作⽤。
再说蚁群有queen，但是queen主要是lay eggs⽽不是organize。
讲座2：植物学botany 讨论动物觅⾷与物种多样性，整个⽂章对⽐polar region与tropical region的动物。
Polar：⼀个动物吃多种⾷物，⽽且还migration，就是因为可以吃的东西选择少，不diverse，这些动物可以被称为generalist，举例foxTropical：动物可以吃东西选择多，⽽且climate stable所以吃⼀种就⾏，这样避免了animals之间的competition。
这些动物是specialist。
举例黄⽑的⼀个动物。
讨论这两种情况呢的利弊：tropical只吃⼀个，要是被吃的那个消失了，就会导致extinction。
说其实⼈类并不是extinction的主要原因，但是⼈类造成的harm也需要考虑，⼈类需要意识到⾃⼰⾏为的后果。
对话2:学⽣服务场景student和employee at theater的对话。
学⽣要买票，因为⽗母来了，要看看什么play可以看。
Employee说可以看哈姆雷特，同时推荐了season ticket给她，并告诉她三个好处：1. Cheep，因为有discount2. 可以卖extra ticket，但不保证座位在⼀起，因为这两部分票是分开卖的，⼥⽣说没有关系。
托福TPO14综合写作阅读+听力原文+满分范文【雷哥托福】
托福TPO14综合写作阅读+听力原文+满分范文【雷哥托福整理】在备考托福写作的过程中，总是将托福的独立作文放在了第一位，但是实际上，综合作文也是占到了作文总分30分里面的50%的分值，不要等到分数出来了，才发现其实是综合作文的limited或者fair极大的影响了自己的分数。
考过的同学会发现托福综合作文分数不高，很大程度上是受我们听力实力的影响，我们很多托福考生的听力分数只有16分上下的时候，对于托福综合作文的听力妥妥的是束手无策，而且很多托福考生还感觉自己都听懂了，那也只能说明你听懂了大意，但是听力里面要的是每一个细节！请注意，是每一个细节！雷哥托福小托君给大家分享TPO1-30综合作文部分的阅读和听力文本全集与综合作文的满分作文，以及满分作文的解析。
如果自己的托福综合作文分数如果可以很给力的话，就已经搞定了15分的分数，可极大地缓解托福独立作文的压力。
文末教你如何使用这个材料。
TPO14 综合写作听力+阅读原文ReadingEvery year, forest fires and severe storms cause a great deal of damage to forests in the northwestern United States. One way of dealing with the aftermath of these disasters is called salvage logging, which is the practice of removing dead trees from affected areas and using the wood for lumber, plywood, and other wood products. There are several reasons why salvage logging is beneficial both to a damaged forest and to the economy.First, after a devastating fire, forests are choked with dead trees. If the trees are not removed, they will take years to decompose; in the meantime, no new trees can grow in the cramped spaces. Salvage logging, however, removes the remains of dead treesand makes room for fresh growth immediately, which i s likely to help forest areas recover from the disaster.Also, dead trees do more than just take up space. Decaying wood is a highly suitable habitat for insects such as the spruce bark beetle, which in large numbers can damage live, healthy spruce trees. So by removing rotting wood, salvage logging helps minimize the dangers of insect infestation, thus contributing to the health of the forest.Third and last, salvage logging has economic benefits. Many industries depend upon the forests for their production, and because of this a fire can have a very harmful effect on the economy. Often, however, the trees that have been damaged by natural disasters still can provide much wood that is usable by industries. Furthermore, salvage logging requires more workers than traditional logging operations do, and so it helps create additional jobs for local residents.ListeningProfessor: Salvage logging may appear to be an effective way of helping forests recover after a destructive fire or storm, but it can actually result in seriouslonger-term environmental damage. Its economic benefits are also questionable.First, cleaning up a forest after a fire or storm does not necessarily create the right conditions for tree growth. In fact, the natural process of wood decomposition enriches the soil and makes it more suitable for future generations of tree. The rapid removal of dead trees can result in soil that lacks the nutrients necessary for growth.Second, it's true that rotting wood can increase insect populations, but is this really bad for the forest? In fact, spruce bark beetles have lived in Alaskan forest for nearly a hundred years without causing major damage. And of course dead trees do not provide habitats only for harmful insects. They are also used by birds and other insects that are important contributors to the long-term health of forests. In the longrun, therefore, salvage logging may end updoing more harm to forests than harmful insects do.And third, the economic benefits of salvage logging are small and don’t last very long, in severely damaged forests, much of the lumber can be recovered only by using helicopters and other vehicles that are expensive to use and maintain. Furthermore, jobs created by salvage logging are only temporary and are often fitted by outsiders with more experience or training than local residents have.首先，就是在自己做托福TPO模考之后，可以根据这里面的听力的文本，来检验自己的听力内容是否抓的足够好，尤其是要看写的够不够全！很多时候，我们的综合作文之所以分低，就是因为听力写的不全！第二点，也可以用于在托福考试前来做跟读，有不少托福考生跟小托君说，自己的口语实力不够，那么做跟读，仔细地来模仿ETS官方素材，是一个很好的提高自己口语的方式。
官方真题Official35托福听力Lecture4对话原文免费分享（原TPO）
官方真题Official35托福听力Lecture4对话原文免费分享(原TPO)官方真题Official模考软件一直是考生不可或缺的一个备考工具，很多托福考生都在用这个。
为了让大家更好的使用这个官方真题Official资料，这里小站教育编辑为大家整理了完整的官方真题Official真题文本、题目及答案解析，希望对大家托福备考有帮助。
官方真题Official35托福听力Lecture 4对话原文免费分享(原TPO)官方真题Official 35-L4Narrator:Listen to part of a lecture in an Earth science class.Professor:Let's review something from last week. We talked about an event that happened 65 million years ago. Anyone?Student:An asteroid hit Earth. Um...well, we think an asteroid hit Earth, near the Yucatan Peninsula, in Mexico, and that wiped out all the dinosaurs.Professor:Right. I wouldn't say that we've got 100% proof, but there's very strong evidence that this is why that mass extinction occurred.Okay. But did you know there was an earlier extinction far greater than the one that killed off the dinosaurs? It was what we call the Permian Extinction.Now, way back about 290 million years ago, at the beginning of the Permian Period, there was just one big continent, a super continent. And as the climate warmed up, plant and animal species began to diversify profusely. So life during the PermianPeriod was abundant and diverse. But about 250 million years ago, the Permian Period ended with a rapid mass extinction, something happened that wiped out 75% of the land animals and over 95% of ocean life.So what was it? What could have caused this?Well, with the all the evidence that it was an asteroid that led to the dinosaur extinction, we began asking ourselves: is it possible that another asteroid much earlier caused the Permian Extinction? And so researchers have been looking for an impact crater.Well, with the all the evidence that it was an asteroid that led to the dinosaur extinction, we began asking ourselves: is it possible that another asteroid much earlier caused the Permian Extinction? And so researchers have been looking for an impact crater.Student:I thought the Permian Extinction was caused by a decline in sea water oxygen levels. Isn't that what's in the textbook?Professor:But don't forget the textbook makes it very clear that's only a theory.Student:And it mentions something about volcanic eruptions too.Professor:It does, but now this new theory has led to a search for evidence of an asteroid impact. And one place of interest is a region called Wilkes Land in eastern Antarctica.A few years ago, a researcher reported a strange anomaly beneath the ice in Wilkes Land. Evidence of what may be a mascon. That's just short for mass concentration.When an asteroid hits Earth, when it slams into Earth's crust, we think that causes molten rock from deep below the surface to rise up into the impact area. Sort of like if you bump your head, you get a big lump under the skin. Fluid makes the area swell. Anyway, the material flowing up from below the crust is more dense than the crust itself. So that's how we get a mascon, a spot in the crust with newer crust material that's more dense than the material all around it.There're lots of mascons on the moon too, where a mascon’s density causes a small increase in the local gravity that can be measured and mapped by orbiting spacecraft. And where do these mascons tend to be found? In the centers of impact craters on the moon's surface.But back to Wilkes Land. We’re not certain that the mascon there...what might be a mascon ...was actually caused by the impact of an asteroid, but there does seem to be evidence. Researchers notice a gravity anomaly similar to those on the moon. And the spot where the gravity readings are especially high...this is right in the middle of a 500-kilometer wide, circular ridge, what could be part of an old impact crater.And if there was an asteroid impact there in Wilkes Land, the next question is: did it happen 250 million years ago? Because that would put it when in geologic history?Student:At the end of the Permian Period? Right when those animals went extinct.Professor: Exactly.Student:But can't researchers figure that out by studying the rocks there in Wilkes Land...where this impact supposedly took place?Professor:Well, to get to anything from that long ago, we would have to drill down to about a mile, about 1.6 kilometers of solid ice that covers the area today. And that's not likely to happen.But speaking of rocks, I should mention that Wilkes Land is not the only place of interest here. There's another called the Bedout High off the coast of Australia. And we have rock samples from the Bedout High. Some apparently have extraterrestrial origin. I mean, they show the effects of extreme temperatures and pressures, the level of extremes produced only by an impact. And as for their age, well, they do in fact, date back to about 250 million years ago.怎样用单词推断托福听力对话场景方法可行的原因仍在于ETS的出题原则，大家肯定已经非常熟悉托福听力考试中的"学生生活原则"，它是ETS坚定不移的出题原则，这一原则使托福听力从内容上永远离不了学生生活这一中心。
托福TPO14听力原文
TPO 14 听力原文Conversation 1Narrator:Listen to a conversation between a student and the librarian employee.Student:Hi, I am looking for this book---the American judicial system. And I can’t seem to findit anywhere. I need to read a chapter for my political science class.Librarian:Let me check in the computer. Um… doesn’t seem to be checked out and it’s not onreserve. You’ve checked the shelves I assume.Student:Yeah, I even checked other shelves and tables next to where the book should be.Librarian:Well, it’s still here in the library. So people must be using it. You know this seems tobe a very popular book tonight. We show six copies. None are checked out. And, yetyou didn’t even find one copy on the shelves. Is it a big class?Student:Maybe about Seventy Five?Librarian:Well, you should ask your professor to put some of the copies on reserve. You knowabout the ‘Reserve system’, right?Student:I know that you have to read reserve books in the library and that you have timelimits. But I didn’t know that I could ask a professor to put a book on the reserve. Imean I thought the professors make that kind of decisions at the beginning of the semester.Librarian:Oh… they can put books on reserve at anytime during the semester.Student:You know reserving book seems a bit unfair. What if someone who is not in the classwants to use the book?Librarian:That’s why I said some copies.Student:Ah, well, I’ll certainly talk to my professor about it tomorrow. But what I am gonna dotonight?Librarian:I guess you could walk around the Poli-Sci ----- ‘Political Science’ section and look atthe books waiting to be re-shelved.Student:There are do seem to be more than normal.Librarian:We are a little short of staff right now. Someone qui t recently, so things aren’t gettingre-shelved as quickly as usual. I don’t think they’ve hired replacement yet, so, yeah,the un-shelved books can get a bit out of hand.Student:This may sound a bit weird. But I’ve been thinking about getting a job. Um… I’venever worked at the library before, But…..Librarian:That’s not a requirement. The job might still be open. At the beginning of the semester we were swamped with applications, but I guess everyone who wants thejob has one by now.Student:What can you tell me about the job?Librarian:Well, we work between six and ten hours a week, so it’s a reasonable amount.Usually we can pick the hours we want to work. But since you’d be starting so late inthe semester, I’m not sure how that would work for you. And… Oh… we get paid thenormal university rates for student employees.Student:So who do I talk to?Librarian:I guess you talk to Dr. Jenkins, the head librarian. She does the hiring.TPO 14 Lecture 1 PsychologyNarrator:Listen to part of a lecture in a psychology classProfessor:We’ve said that the term “Cognition” refers to mental states like: knowing and believing, and to mental processes that we use to arrive at those states. So forexample, reasoning is a cognitive process, so it’s perc eption. We use information thatwe perceive through our senses to help us make decisions to arrive at beliefs and soon. And then there are memory and imagination which relate to the knowledge of things that happen in the past and may happen in the future. So perceiving,remembering, imagining are all internal mental processes that lead to knowing or believing. Yet, each of these processes has limitations, and can lead us to hold mistaken believes or make false predictions. Take memory for example, maybe youhave heard of studies in which people hear a list of related words. Ah…, let`s say a listof different kinds of fruit. After hearing this list, they are presented with several additional words. In this case, we`ll say the additional words were “blanket” and “cheery”. Neither of these words was on the original list, and, well, people will claimcorrectly that “blanket” was not on the original list, they’ll also claim incorrectly thatthe word “cheery” was on the list. Most people are convinced they heard the word “cheery” on the original list. Why do they make such a simple mistake? Well, we think because the words on the list were so closely related, the brain stored only thegist of what they heard. For example, that all the items on the list were types of thefruit. When we tap our memory, our brains often fill in details and quite often thesedetails are actually false. We also see this “fill-in” phenomenon with perception.Perception is the faculty that allows us to process information in the present as we take it via our senses. Again, studies have shown that people will fill in informationthat they thought they perceived even when they didn`t. For example, experimentshave been done where a person hears a sentence, but it is missing the word, that lo gically completes it. They’ll claim to hear that word even though it was never said.So if I were to say…er…the sunrise is in the…and then fill to complete the sentence,people will often claim to have heard the word “east”.In cognitive psychology, we hav e a phrase for this kind of inaccurate “filling in of details”--- it’s called: A Blind Spot. The term originally refers to the place in our eyeswhere the optic nerve connects the back of the eye to the brain. There are no photoreceptors in the area where the nerve connects to the eye. So that particular area ofthe eye is incapable of detecting images. It produces “A Blind Spot” in our field vision.We are unaware of it, because the brain fills in what it thinks belongs in its image, sothe picture always appears complete to us. But the term “blind spot” has also takenon a more general meaning--- it refers to people being unaware of a bias that may affect their judgment about the subject. And the same “blind-spot phenomenon”that affects memory and perception also affects imagination. Imagination is a facultythat some people use to anticipate future events in their lives. But the ease with which we imagine details can lead to unrealistic expectations and can bias our decisions.So…er…Peter, suppose I ask you to image a lunch salad, no problem, right? But I betyou imagine specific ingredients. Did yours have tomatoes, Onion, Lettuce? mine did?Our brains fill in all sorts of details that might not be part of other people’s image of asalad, which could lead to disappointment for us. If the next time we order a salad ina restaurant, we have our imagined salad in mind, that’s not necessarily what we’llget on our plate. The problem is not that we imagine things, but that we assume what we’ve imagined is accu rate. We should be aware that our imagination has thisbuilt-in feature, the blind spot, which makes our predictions fall short of reality.TPO 14 Lecture 2 BiologyNarrator:Listen to part of a lecture in a biology class.Professor:Almost all animals have some way of regulating their body temperature; otherwisethey wouldn’t survive extreme hot or cold conditions---sweating, panting, swimmingto cooler or warmer water; ducking into somewhere cool like a burrow or a hole under a rock; these are just a few. And that’s body is colder or warmer than the surrounding environment, because it’s a microclimate.A microclimate is a group of climate conditions that affect the localized area, weatherfeatures like temperature, wind, moisture and so on. And when I say localized, I mean really localized, because microclimates can be, as the name suggests, pretty small, even less than a square meter. And microclimates are affected by hugenumber of other variables. Obviously weather conditions in the surrounding areas are a factor. But other aspects of the location like, um… the elevation of the land, theplant life nearby, and so on, have a substantial effect on microclimates. And of coursethe human development in the area, eh, a road will affect a nearby microclimate. It’salso interesting to know that microclimates thither or near each other can have verydifferent conditions. In the forest for example, there can be a number of verydifferent microclimates close to each other, because of all the variables I justmentioned.Student:So how does a hole in the ground, a burrow, stay cool in a hot climate?Professor:Well, since cold air sinks, and these spots are shaded, they are usually much coolerthan the surrounding area. And these spots are so important because many animalsrely on microclimates to regulate their body temperature. Hmm, for instance, there isa species of squirrel, in the Western part of the United States that can get really hotwhen they were out foraging for food. So they need a way to cool down. So what’dthey do? They go back to their own burrow. Once they get there, their bodytemperatures decrease very, very quickly. The trip to the burrow prevents thesquirrel from getting too hot.Student:But squirrels are mammals, right? I thought mammals regulate their temperature internally.Professor:Mammals do have the ability to regulate their body temperature, but not all can do itto the same degree, or even the same way. Like when you walk outside on a hot day,you perspire, and your body cools itself down, a classic example of how mammal regulates its own body temperature. But one challenge that squirrels face, well manysmall mammals do, is that because of their size, sweating would make them lose toomuch moisture. They dehydrate. But on the other hand, their small size allows themto fit into very tiny spaces. So for small mammals, microclimates can make a big difference. They rely on microclimates for survival.Student:So cold blood animals, like reptiles, they can’t control their own body temperature,so I can image the effect of microclimate would have on them.Professor:Yes, many reptile insects rely on microclimates to control their body temperature. Alot of reptiles use burrows or stay under rocks to cool down. Of course with reptiles,it’s a balancing act. Staying in the heat for too long can lead to problems, but stayingin the cold can do the same. So reptiles have to be really precise about where they spend their time, even how they position their bodies. And when I say the y’reprecise, I mean it--- some snakes will search out a place under rocks of a specific thickness, because too thin a rock doesn’t keep them cool enough, and too thick a rock will cause them to get too cold. That level of precision is critical to the snake formaintaining its body temperature. And even microscopic organisms rely onmicroclimates for survival.Think about this, decomposing leaves create heat that warms the soil; the warm soilin turn affects the growth, the conditions of organisms there. And those organisms then affect the rate of decomposition of the leaves. So a microclimate can besomething so small and so easily to disturbed that even a tiny change can have a bigimpact. If someone on a hike knocks a couple of rocks over, they could be unwittinglydestroying a microclimate that an animal or organism relies on.TPO 14 Conversation 2Narrator:Listen to a conversation between a student and his faculty adviserAdvisor:Hi ，Steven I schedule this appointment, cause it has been a while since we touch this.Student:I know I have been really busy--- a friend of my works on a school a paper. Heasksme if I would like to try to reporting so I did and I really love it.Advisor:Hey…that's sounds great!Student:Yeah… the first article I wrote it was profile of the chemistry professor---the one whose name teacher the year. My article ran on the front page. When I saw my name, I mean my byline in print, I was hooked. Now I know this is what I want to do--- be a reporter.Advisor:Isn't it great to discover something that you really enjoy? And I read that the articletoo? It was very good.Student:To be honest, the articles got a lot of editing. In fact I barely recognized a couple ofparagraphs. But the editor explained why the changes were made. I learned a lot andmy second article didn't meet nearly many changes.Advisor:Sound like you got a real neck for this.Student:Yeah… anyway, I am glad you schedule this meeting because I want to change mymajor to journalism now.Advisor:Um，the university doesn't offer major in journalism.Student:Oh no…Advisor:But….Student:I… I mean… should I transfer to another school, or major in English?Advisor:Er… wait a minute. Let me explain why the major isn’t offered. Editors at t he newspaper… editors… um… I mean when you apply for a reporting job, editors lookat the two things--- they want to see clips, you know, some of your published articles,though also want to try out, though give you an assignment like… covering a price ofconferences some other event, then see if you can craft the story about it, accurately,on dead line.Student:So they don't even to look at my major?Advisor:It is not that they don't look at it… it is… well, having a degree in something otherthan journalism should actually work to your advantage.Student:How?Advisor:Most journalism specialized these days. They only write about science or business ortechnology for example. Is there a type of reporting you think you may like to specialize then?Student:Well… I think it can be really cool to cover the Supreme Court. I mean… theirdecisionaffects so many people.Advisor:That is really a goal worth striving for. So, why not continue major in political science?And as elective, you could take some Pre-Law classes like Constitution Law, and asfor you work on the student newspaper paper, maybe they let you cover some localcourt cases--- once that the student and professor here would want to read about.Student:Do you know of any？Advisor:I do. Actually, there is case involving this computer software program that one of ourprofessors wrote. The district courts decide in if the university entitle to any of ourprofessors' profits?Student:Wah…. I will definitely follow upon that!TPO 14 Lecture 3 AstronomyNarrator:Listen to part of a lecture in an astronomy class.Professor:OK, last time we talked about ancient agricultural civilizations that observed the starsand then used those observations to keep track of the seasons. But today I want to talk about the importance of stars for early seafarers, about how the fixed patterns of stars were used as navigational aids.OK, you’ve all heard about the Vikings and their impressive navigation skills, but theseafaring people of the pacific islands, the Polynesians and the Micronesians,werequite possibly the world’s greatest navigators. Long before the development of, uh,advanced navigational tools in Europe, pacific islanders were travelling from NewZealand to Hawaii and back again, using nothing but the stars as their navigationalinstruments.Um, the key to the pacific islanders’ success was probably their location near the equator. What that meant was that the sky could be partitioned, divided up, much more symmetrically than it could farther away from the equator. Unlike the Vikings,early observers of the stars in Polynesia or really anywhere along the equator wouldfeel that they were at the very center of things, with the skies to the north and the skies to the south behaving identically, they could see stars going straight up in theeast and straight down in the west. So it was easier to discern the order in the sky than farther north or farther south, where everything would seem more chaotic.Take the case of the Gilbert Islands, they are part of Polynesia, and lie very close tothe equator. And the people there were able to divide the sky into symmetrical boxes,according to the main directions, north, east, south and west. And they couldprecisely describe the location of a star by indicating its position in one of those imaginary boxes. And they realized that you had to know the stars in order tonavigate. In fact there was only one word for both in the Gilbert Islands, when youwanted to the star expert, you ask for a navigator.Um, islanders from all over the pacific learned to use the stars for navigation, and they passed this knowledge down from generation to generation. Some of them utilized stone structures called stone canoes, ah, and these canoes were on land, ofcourse, and you can still see them on some islands today. They were positioned as ifthey were heading in the direction of the points on the sea horizon where certain stars would appear and disappear during the night, and, um, young would-benavigators set by the stones at night and turned in different directions to memorizethe constellations they saw, so they could recognize them and navigate… by them later on when they went out to sea.One important way the Polynesians had for orienting themselves was by using zenithstars. A zenith star was a really bright star that would pass directly overhead atparticular latitude…at a particular distance from the equator, often at a latitude associate with some particular pacific island. So the Polynesians could estimate theirlatitude just by looking straight up, by observing whether a certain zenith star passeddirectly overhead at night, they’d know if they have rates the same latitude as a particular island they were trying to get to. Um, another technique used by the Po lynesians was to look for a star pair, that’s two stars that rise at the same time, orset at the same time, and navigators could use these pairs of stars as reference points,because they rise or set together only at specific latitudes. So navigators might seeone star pair setting together. And, uh…would know how far north or south of the equator they were. And if they kept on going, and the next night they saw the pairsof stars setting separately, then they would know that they were at a different degreeof latitude. So looking at rising and setting star pairs is a good technique. Um…actually it makes more sense with setting stars; they can be watched instead of tryingto guess when they’ll rise.Uh, OK, I think all this shows that navigating doesn’t re ally require fancy navigationalinstruments; the peoples of the pacific islands had such expert knowledge ofastronomy as well as navigation that they were able to navigate over vast stretches ofOpen Ocean. Uh, it's even possible that Polynesian navigators had already sailed tothe Americas, centuries before Columbus.TPO 14 Lecture 4 ArcheologyNarrator:Listen to part of the lecture in the archaeology classProfessor:When we think of large monumental structures built by early societies and Egyptianpyramid probably comes to mind. But there are some even earlier structures in theBritish Isles also worth discussing, and besides the well-known circle of massivestones of Stonehenge which don’t get me wrong is remarkable enough, well, otherimpressive Neolithic structures are found there too. Oh, yes, we are talking about theNeolithic period here, also called new Stone Age, which was the time before stonetools began to be replaced by tools made by bronze and other metals.It was about 5000 years ago, even before the first Egyptian pyramid that some of amazing Neolithic monuments---tombs, were racketed at the very size around ironedGreat Britain and costal islands nearby.I am referring particular to structures that in some cases, look like ordinary naturalhills. But we definitely build by humans, well-organized communities of human’s toenclose a chamber or room within stone walls and sometimes with a high, cleverlydesigned sealing of overlapping stones. These structures are called Passage Graves,because in the chamber, sometime several chambers in fact, could only be entered from the outside through a narrow passage way.Michael:Excuse me, professor, but you said Passage Graves. Was this just monument to honorthe dead buried there or were they designed to be used somehow by the living?Professor:Ah, yes! Good question, Michael. Besides being built as tombs, some of these Passage Graves were definitely what we might call Astronomical Calendars, with chambers they flooded with some light on the certain special days of the year, witchmust see miraculous and inspired good dealer of they really just wonder. Butresearch indicates that not just light but also the physics of sound help to enhance this religious experience.Michael:How so?Professor:Well, first the echoes. When religious leaders started chanting with echoes bouncedoff the stonewalls over and over again, it must seem like a whole chorus of other voices, spirits of God maybe join in. But even more intriguing is what physicistscalledStanding Waves. Basically, the phenomenon of Standing Waves occurs when soundwaves of the same frequency reflect off the walls and meet from opposite directions.So, the volume seems to alternate between very loud and very soft. You can stand quite near a man singing in loud voice and hardly hear him. Yet step little further away and voice is almost defining. As you move around chamber, the volume of thesound goes way up and way down, depending on where you are and these standingwaves. And often the acoustic makes it hard to identify where sounds are coming from. It is powerful voices that are speaking to you or chanting from inside your ownhead. This had to engender powerful sense of all Neolithic worshipers.And another bit of physics I played here is something called Resonance. I know physics, but well I imagine you have all below near of top empty bottles and heardsounds it makes. And you probably notice that depending on its size--- each emptybottle plays one particular music note. Or it is the physics might put it, each bottle resonates at a particular frequency. Well, that’s true of these chambers too. If you make a constant noise inside the chamber, maybe by steadily beating drum at certainrate, a particular frequency of sound will resonate. We will ring out intensely,depending on the size of chamber. In some of large chambers though, theseintensified sound may be too deep for us to hear, we can feel it. We are mysteriouslyagitated by a….but it is not a sound our ears can hear. The psychologic al effects of allthese extraordinary sounds can be profound, especially when they seem sodisconnected from human doing drumming or chanting. And there can be observablephysical effects on people too. In fact, the sounds can cause headaches, feelings ofdizziness, increase heartache, that sort of thing, you see.Anyway, what is we experience inside one of these Passage Graves clearly could befar more intense than everyday reality outside which made them very special places.But back to your question, Michael, as to whether these Graves were designed to beused by the living. Well, certainly, we have got to ask economical or calendarfunction. That seems pretty obvious, and I wanna go into more detail on that now.。
托福听力tpo49 lecture1、2、3、4 原文+题目+答案+译文
托福听力tpo49lecture1、2、3、4原文+题目+答案+译文Lecture1 (1)原文 (1)题目 (4)答案 (6)译文 (6)Lecture2 (8)原文 (8)题目 (10)答案 (12)译文 (12)Lecture3 (14)原文 (14)题目 (17)答案 (19)译文 (19)Lecture4 (21)原文 (21)题目 (23)答案 (25)译文 (25)Lecture1原文NARRATOR:Listen to part of a lecture in a geology class.MALE PROFESSOR:Alaska is fascinating to geologists because of its incrediblelandscapes.Uh,permafrost has a lot to do with this.That is,the areas where the ground—the soil—is always frozen,except for the very top layer—what we call the active layer of permafrost—which melts in the summer and refreezes again in the winter.The northern part of Alaska is covered in lakes—thousands of them—and most of these are what we call thaw lakes.T-h-a-w.Thaw lakes.I'm gonna show you a few sketches of them in a minute,so you'll have a good idea of what I'm talking about.So, how these thaw lakes are formed has to do with…OK,it starts with ice wedges.The top part of the ice wedge melts—Should I back up?Ice wedges form when water runs into cracks in the ground,the permafrost,then freezes.You ever see mud after it dries?Dried mud has cracks,because when it dries, it contracts,it shrinks.Well,in winter,permafrost behaves similarly.It shrinks in winter,because it freezes even more thoroughly then,and as it shrinks,it forms deep,deep cracks.Then in the summer,when the active layer—the top layer of the permafrost—melts,the melt water runs into those cracks in the permafrost,then freezes again—because that ground,the ground beneath the active layer,is still below freezing.So,you have wedges of ice in the permafrost.Now the ice wedges widen the original cracks in the permafrost,because water expands when it freezes.All right?OK,then in autumn,the active layer on top freezes again.Then in winter,the permafrost starts contracting again and the cracks open up even wider.So the next summer,when the active layer melts again and flows into the widened cracks…and…freezes…it makes the cracks even wider.So it’s sort of a cycle through which the cracks and the wedges grow wider and wider.So when the ice wedge reaches a certain size,its top part—in the active layer—turns into a little pond when it melts in the summer.And that's the beginning of your thaw lake.[pause]There are thousands of them in northern Alaska.One of the most fascinating things about these lakes—and this is important—is that they mostly havethe same shape.Like an elongated oval,or egg shape.And what's more,all the ovals are oriented in the same way.Here's an idea of what they look like,what the landscape looks like from an aerial view,with the lakes side by side.There's been considerable research done to try to figure out what causes them to be shaped and oriented this way.We know that the shape and orientation are caused by the way the lakes grow once they're formed,but the question is,what makes them grow this way?One theory sees winds as the cause.This region of Alaska has strong winds that blow perpendicular to the lakes.What happens is,wind blows straight into the longer side of the lakes.Now,wouldn’t that erode the lake bank in that direction?The same direction as the wind?Well…no.Actually,what happens is that the waves caused by the winds build a sorta protective layer of sediment—it's called a“protective shelf”—along the bank of the lake directly in front of them;so that bank is shielded from erosion,and the waves are diverted to the sides,to the left and to the right,and that’s why the left and the right banks start eroding.Get it?The bank straight ahead is protected,but the lake currents--the waves--erode the banks to the sides.That's the current model,um,the wind erosion model,which is generally accepted.But,there's a new theory that says that[deliberately]thaw slumping,not wind,is what shapes the thaw lakes.Thaw slumping,um…OK.Sometimes,in the summer,the temperature rises pretty quickly.So the active layer of permafrost thaws faster than the water can drain from the soil.So the sides of the thaw lakes get,like,mushy,and slump,or slide,into the lake.Then,the lake water spreads out more,and the lake gets bigger,OK?Also,in that part of Alaska,the terrain is gently sloped,so the lakes are all on an incline.Here.Now,this is an exaggeration of the angle—the hill isn't this steep—butsee how with the lake's banks,the side that is farther downhill…it's smaller,lower. This short bank thaws faster than the tall one does,so it falls into the lake—it slumps, much more and much faster than the other bank.When the short banks of many lakes slump,they move farther downhill and the lakes grow—all in the same downhill direction.This is a new theory,so it hasn't been tested much yet.In field studies,when we've looked at the banks of these thaw lakes,there's not much evidence of slumping. We'd expect to see cliff-like formations there,from the slumping,but we haven't really found many of those.题目1.What is the main purpose of the lecture?[Click on two answers.]A.To contrast how different kinds of thaw lakes growB.To explain why a new theory of thaw lakes is gaining acceptanceC.To explain how processes in permafrost lead to the formation of thaw lakesD.To describe two competing theories about the growth of thaw lakes2.The professor explains thaw lake formation as a cycle of events that occur repeatedly.Summarize this cycle,starting with the event filled in below.[Click on a sentence.Then drag it to the space where it belongs.The first one is done for you. One sentence will not be used]A.Meltwater flows into cracks in permafrostB.Ice wedges inside permafrost completely meltC.Freezing water expands cracks in permafrostD.Ice in the active layer melts as temperatures riseE.Permafrost shrinks and cracks as temperatures drop..3.What is the significance of the'protective shelf'discussed by the professor?A.It prevents the slumping of lake banks.B.It shields the lake surface from strong winds.C.It redirects the waves to lake banks that do not face the wind.D.It allows the lakes to grow in the same direction as the wind blows.4.According to the thaw slumping model,which side of a thaw lake grows fastest?A.The side where the bank is shortestB.The side least exposed to windC.The side that is at the highest elevationD.The side opposite the protective shelf5.What is the professor's opinion of the thaw slumping model?A.He thinks it was urgently needed.B.He is not convinced that it has a firm basis.C.He thinks it would be better if it were simplified.D.He does not think it is very different from the old model.6.Why does the professor say this:You ever see mud after it dries?A.He wants some information from the students.B.He thinks that the students may find an example helpful.C.He realizes that he forgot to mention an important topic.D.He wants to point out an important difference between frozen ground and dry ground.答案CD EDACB C A B B译文听一段地质学的讲座。
【托福听力资料】托福TPO14听力文本——Lecture 4
【托福听力资料】托福TPO14听力文本——Lecture 4众所周知，托福TPO材料是备考托福听力最好的材料。
相信众多备考托福的同学也一直在练习这套材料，那么在以下内容中我们就为大家带来托福TPO听力练习的文本，希望能为大家的备考带来帮助。
TPO 14 Lecture 4 ArcheologyNarrator: Listen to part of a lecture in an archaeology classProfessor:When we think of large monumental structures built by early societies, an Egyptian pyramid probably comes to mind. But there are some even earlier structures in the British Isles also worth discussing, and besides thewell-known circle of massive stones of Stonehenge, which don’t get me wrong is remarkable enough, well, other impressive Neolithic structures are found there too. Oh, yes, we are talking about the Neolithic period here, also called new Stone Age, which was the time before stone tools began to be replaced by tools made of bronze and other metals. It was about 5000 years ago, even before the first Egyptian pyramid that some amazing Neolithic monuments---tombs, were erected at various sites around Ireland, Great Britain and coastal islands nearby.I am referring particular to structures that in some cases, look likeordinary natural hills but were definitely built by humans, well-organized communities of humans to enclose a chamber or room within stone walls and sometimes with a high, cleverly designed ceiling of overlapping stones. These structures are called Passage Graves, because the inner chamber, sometimesseveral chambers in fact, could only be entered from the outside through a narrow passageway.Michael: Excuse me, professor, but you said Passage Graves. Were these just monuments to honor the dead buried there or were they designed to be used somehow by the living?Professor: Ah, yes! Good question, Michael. Besides being built as tombs, some of these Passage Graves were definitely what we might call Astronomical Calendars, with chambers that were flooded with sunlight on certain special days of the year, which must’ve have seemed miraculous and inspired a good deal of religious wonder. But research indicates that not just light but also the physics of sound helped enhance this religious experiences.Michael: How so?Professor:Well, first the echoes. When a religious leader started chanting with echoes bouncing off the stonewalls over and over again, it must’ve seemed like a whole chorus of other voices, spirits of Gods maybe, joining in.But even more intriguing is what physicists calledStanding Waves. Basically, the phenomenon of Standing Waves occurs when sound waves of the same frequency reflect off the walls and meet from opposite directions. So, the volume seems to alternate between very loud and very soft. You can stand quite near a man singing in loud voice and hardly hear him. Yetstep a little further away and his voice is almost deafening. As you move around the chamber, the volume of the sound goes way up and way down, depending on where you are in these standing waves. And often the acoustics make it hard to identify where sounds are coming from. It’s as if powerful voices are speaking to you or chanting from inside your own head. This had to engender a powerful sense of awe in Neolithic worshipers.And another bit of physics at play here is something called Resonance. I am no physicist, but well I imagine you have all blown air over the top of an empty bottle and heard the sound it makes. And you’ve probably noticed that depending on its size--- each empty bottle plays one particular musical note. Or as a physicist might put it, each bottle resonates at a particular frequency. Well, that’s true of these chambers too. If you make a constant noise inside the chamber, maybe by steadily beating drum at a certain rate, a particular frequency of sound will resonate, will ring out intensely, depending on the size of the chamber. In some of the larger chambers though, these intensified sound may be too deep for us to hear, we can feel it. We are mysteriously agitated by it….but it is not a sound our ears can hear.The psychological effects of all these extraordinary sounds can be profound, especially when they seem so disconnected from the human doing the drumming or chanting. And there can be observable physical effects on people too. In fact, the sounds can cause headaches, feelings of dizziness, increased heart rate, that sort of thing, you see. Anyway, what was experienced inside one of thesePassage Graves clearly could be far more intense than the everyday realityoutside, which made them very special places.But back to your question, Michael, as to whether these Graves were designed to be used by the living. Well, certainly, with regard to astronomical orcalendar function. That seems pretty obvious, and I wanna go into more detail onthat now.。
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托福听力TPO14原文Lecture4下面就让小编来为大家介绍一下托福听力TPO14原文中Lecture4的文本内容吧，大家要好好把握，这些都是非常有价值的材料，同时，大家也可以登录前程百利论坛进行TPO练习辅导，希望能够给准备托福听力的同学带来帮助。
TPO14Lecture4ArcheologyProfessor：When we think of large monumental structures built by early societies and Egyptian pyramid probably comes to mind.But there are some even earlier structures in the British Isles also worth discussing,and besides the well-known circle of massive stones of Stonehenge which don’t get me wrong is remarkable enough,well,other impressive Neolithic structures are found there too.Oh,yes,we are talking about the Neolithic period here,also called new Stone Age,which was the time before stone tools began to be replaced by tools made by bronze and other metals.It was about5000years ago,even before the first Egyptian pyramid that some of amazing Neolithic monuments---tombs, were racketed at the very size around ironed Great Britain and costal islands nearby.I am referring particular to structures that in some cases,look like ordinary natural hills.But we definitely build by humans,well-organized communities of human’s to enclose a chamber or room within stone walls and sometimes with a high,cleverly designed sealing of overlapping stones.These structures are called Passage Graves,because in the chamber,sometime several chambers in fact,could only be entered from the outside through a narrow passage way.Michael：Excuse me,professor,but you said Passage Graves.Was this just monument to honor the dead buried there or were they designed to be used somehow by the living?Professor：Ah,yes!Good question,Michael.Besides being built as tombs,some of these Passage Graves were definitely what we might call Astronomical Calendars,with chambers they flooded with some light on the certain special days of the year,witch must see miraculous and inspired good dealer of they really just wonder.But research indicates that not just light but also the physics of sound help to enhance this religious experience.Michael：How so?Professor：Well,first the echoes.When religious leaders started chanting with echoes bounced off the stonewalls over and over again,it must seem like a whole chorus of other voices,spirits of God maybe join in.But even more intriguing is what physicists called Standing Waves.Basically,the phenomenon of Standing Waves occurs when sound waves of the same frequency reflect off the walls and meet from opposite directions.So,the volume seems to alternate between very loud and very soft.You can stand quite near a man singing in loud voice and hardly hear him.Yet step little further away and voice is almost defining.As you move around chamber,the volume of the sound goes way up and way down,depending on where you are and these standing waves.And often the acoustic makes it hard to identify where sounds are coming from.It is powerful voices that arespeaking to you or chanting from inside your own head.This had to engender powerful sense of all Neolithic worshipers.And another bit of physics I played here is something called Resonance.I know physics,but well I imagine you have all below near of top empty bottles and heard sounds it makes.And you probably notice that depending on its size---each empty bottle plays one particular music note.Or it is the physics might put it,each bottle resonates at a particular frequency.Well, that’s true of these chambers too.If you make a constant noise inside the chamber,maybe by steadily beating drum at certain rate,a particular frequency of sound will resonate.We will ring out intensely,depending on the size of chamber.In some of large chambers though,these intensified sound may be too deep for us to hear,we can feel it.We are mysteriously agitated by a….but it is not a sound our ears can hear.The psychological effects of all these extraordinary sounds can be profound,especially when they seem so disconnected from human doing drumming or chanting.And there can be observable physical effects on people too.In fact,the sounds can cause headaches,feelings of dizziness,increase heartache,that sort of thing,you see.Anyway,what is we experience inside one of these Passage Graves clearly could be far more intense than everyday reality outside which made them very special places.But back to your question,Michael,as to whether these Graves were designed to be used by the living.Well,certainly,we have got to ask economical or calendar function.That seems pretty obvious,and I wanna go into more detail on that now.《考古学》教授：当我们想到早期的社会上人们建造的一些大型建筑物时，埃及金字塔便会浮现于眼前。