birds in flight 在飞行中的鸟类
托福阅读tpo64R-1原文+译文+题目+答案+背景知识
TPO64阅读-1Characteristics of Pterosaurs原文 (1)译文 (3)题目 (4)答案 (8)背景知识 (8)原文Characteristics of Pterosaurs①The extinct flying reptiles called pterosaurs were the second group of animals (after insects)to evolve flight.Most pterosaurs were about the size of modern seagulls.A few were as small as sparrows,but some of the later species were the largest flying animals that have ever lived.In1817Theodore Von Soemmerring published the first description of a pterosaur fossil,and thinking that it was that of an unusual bat species,he drew his reconstruction with a very batlike posture and wing.His early reconstruction of a pterosaur has haunted the public and scientific perception of pterosaurs ever since.Soemmerring’s reconstruction is understandable given that he was the first to try to describe a pterosaur,that few naturalists of the time accepted the idea of major groups of extinct animals,and that both pterosaurs’and bats’wings consist of a membrane supported by enormously elongated finger bones.Soemmerring showed his pterosaur with the laterally directed legs and reoriented feet of bats and with the wing membrane stretching from the arm and finger along the sides of the body and legs all the way to the ankle.The reconstruction also included a membrane stretching between the legs,similar to that in bats.Even though other scientists developed less batlike descriptions of pterosaurs in the late1800s,the popular literature,and even some scientific literature,continued to describe pterosaurs as batlike into the1980s.②Bats perch by hanging upside down from tree limbs and roofs of caves.Though many are surprisingly agile climbers,bats are generally awkward when crawling on level surfaces.Did pterosaurs also hang upside down and avoid landing on the ground?Until recently,some paleontologists thought they did,but most scientists now agree that pterosaurs got around on the ground reasonably well.What is still uncertain is whether pterosaurs walked on all fours or just on their hindlegs. Pterosaurs’ancestors were bipedal(two-footed)and used their tails to balancetheir forward-tilted trunks and heads.Early pterosaurs also had long tails and probably could have run on their hindlegs,certainly handy for an animal with wings for forelimbs.These early pterosaurs,however,could have used their forelimbs for walking because their arm and hand bones were only slightly enlarged—most of the wing was supported by the gigantic fourth finger.③Later pterosaurs are more enigmatic:their arms and especially their hands seem too long to be used comfortably for walking,but their tails were too short to counterbalance their bodies if they walked just on their hindlegs.Birds also have short,stubby tail skeletons,but they manage to walk quite well on their hindlegs. Birds manage this by angling the thighs forward to get their feet under the body’s center of gravity.They hold their thighs at this unstable angle with extensive hip and thigh muscles.Some researchers have suggested that pterosaurs’hipbones were too small to anchor extensive thigh-positioning muscles,but others have responded that pterosaurs’leg and foot bones are so strikingly birdlike that pterosaurs must surely have walked like birds.Recently,however,some pterosaur experts have concluded that a number of fossil trackways—trails of preserved footprints—were made by pterydactyloid pterosaurs,and these animals clearly walked on all four limbs.Perhaps some early pterosaurs walked on their hindlegs, but according to current evidence,most species probably walked on all fours.In any case,large pterosaurs,with eight-or ten-meter wingspans and weighing as much as an adult human,do not seem likely candidates for a batlike existence confined to clambering about in trees and hanging upside down from branches.④Pterosaurs also possessed some obvious adaptations for powered flight.They had large sternums(breastbones)for attaching powerful flight muscles, well-developed shoulder bones to carry the body’s weight in flight,and air-filled bones to lighten the skeleton.Some even had a furcula(a fused breastbone also found in birds),perhaps to flex like a spring and help raise the wings during the upstroke.How competent were they at flying?The original batlike reconstructions, along with their classification as reptiles,suggested to many earlier biologists that pterosaurs were only gliders.Biologists now,however,generally agree that pterosaurs were capable of powered,flapping flight.Indeed,the shoulder joint is clearly specialized for the down-and-forward,up-and-back movement of normal flapping.译文翼龙的特点①继昆虫之后，灭绝的飞行爬行动物翼龙是第二个进化出飞行能力的动物。
托福阅读材料：莱特兄弟和飞机
托福阅读材料：莱特兄弟和飞机备考托福阅读的过程中，需要同学们掌握大量的阅读材料，这样更加有助于提高同学们的阅读速度和准确率，所以小编为大家整理了“莱特兄弟和飞机”，让同学们来练习一下！莱特兄弟指的是奥维尔(1871年8月19日—1948年1月30日)和维尔伯(1867年4月16日—1912年5月30日)这两位美国人。
世人一般认为他们于1903年12月17日首次完成完全受控制、附机载外部动力、机体比空气重、持续滞空不落地的飞行，并因此将发明了世界上第一架实用飞机的成就归功给他们。
象鸟儿一样在天空飞翔，自古以来就是人类的梦想。
为了它的实现，人们付出了多年坚持不懈的努力，甚至许多先驱者生命的代价。
终于在1903年12月17日，世界上第一架载人动力飞机在美国北卡罗来纳州的基蒂霍克飞上了蓝天。
这架飞机被叫做“飞行者—1号”，它的发明者就是美国的威尔伯·莱特和奥维尔·莱特兄弟。
莱特兄弟的第一次有动力的持续飞行，实现了人类渴望已久的梦想，人类的飞行时代从此拉开了帷幕。
威尔伯·莱特生于1867年4月16日，他的弟弟奥维尔·莱特生于1871年8月19日，他们从小就对机械装配和飞行怀有浓厚的兴趣，从事自行车修理和制造行业。
莱特兄弟原以修理自行车为生，兄弟俩聪明好学，从1896年开始，他们就一直热心于飞行研究。
通过多次研究和实验，他们很快得出一个结论：要解决飞机操纵这个悬而未决的关键问题，必须装上某种能使空气动力学发挥作用的机械装置。
他们按照这一想法，在基蒂霍克沙丘上空对载人滑翔机进行了几度寒暑的试验之后，他们的梦想终于变成了现实。
奥托·李林塔尔试飞滑翔机成功的消息使他们立志飞行。
1896年李林塔尔试飞失事，促使他们把注意力集中在了飞机的平衡操纵上面。
他们特别研究了鸟的飞行，并深入钻研了当时几乎所有关于航空理论方面的书籍。
这个时期，航空事业连连受挫，飞行技师皮尔机毁人亡，重机枪发明人马克沁试飞失败，航空学家兰利连飞机带人摔入水中，等等，这使大多数人认为飞机依靠自身动力的飞行完全不可能。
新概念英语课文学习：Bird flight 鸟的飞行方法
新概念英语课文学习：Bird flight 鸟的飞行方法What are the two main types of bird flight described by the author？No two sorts of birds practise quite the same sort of flight； the varieties are infinite； but two classes may be roughly seen. Any shi that crosses the Pacific is accompanied for many days by the smaller albatross， Which may keep company with the vessel for an hour without visible or more than occasional movement of wing. The currents of air that the walls of the ship direct upwards， as well as in the line of its course， are enough to give the great bird with its immense wings sufficient sustenance and progress. The albatross is the king of the gliders， the class of fliers which harness the air to their purpose， but must yield toits opposition. In the contrary school， the duck is supreme. It comes nearer to the engines with which man has 'conquered' the air， as he boasts. Duck， and like them the pigeons，are endowed with such-like muscles， that are a good part of the weight of the bird， and these will ply the short wings with such irresistible power that they can bore for long distances through an opposing gale before exhaustion follows. Their humbler followers， such as partridges， have a like power of strong propulsion， but soon tire. You may pick them up in utter exhaustion， if wind over the sea has driven them to a long journey. The swallow shares the virtues of both schools in highest measure. It tires not， nor does it boast of its power； but belongs to the air， travelling it may be six thousand miles to and from its northern nesting home，feeding its flown young as it flies， and slipping through weno longer take omens from their flight on this side and that；and even the most superstitious villagers no longer take off their hats to the magpie and wish it good-morning.WILLIAM BEACH THOMAS A Countryman's CreedNew words and expressions 生词和短语albatross n. 信天翁sustenance n. 支撑力glider n. 滑翔者harness v. 利用endow v. 赋有ply v. 持续地供给gale n. 大风partridge n. 鹧鸪like adj. 类似的propulsion n. 推动力utter adj. 完全的slip v. 滑行adverse adj. 逆的，相反的omen n. 预兆参考译文没有任何两种鸟的飞行方式是相同的。
英语中不同的族群有不同的说法
cast 指一次所放飞的鹰或隼的数目，通常为一对：
te， 一群；
covert 一群大鹋；
covey， 一群松鸡、石鸡或其它作猎物的鸟；
drift， 一群或一堆，尤指家猪；
exaltation， 一群云雀； fall， 一群飞行中的丘鹬； gam， 一群鲸或一伙捕鲸人，尤指在海上的； kennel， 一群住在一起或属同一个人所有的猎狗或狗； kindle， 一窝或一巢，尤指小猫： litter， 一产多胎的哺乳动物一次所生的幼仔的总数； muster， 一群孔雀； nide， 一窝野鸡； pod， 一小群海豹或鲸； pride， 一群狮子； rout， 一群在行进中的人或动物，尤指骑士或狼； school， 一群鱼或水生哺乳动物如海豚或小鲸； shrewdness， 一群猿； skein， 一群猎鸟，尤指鹅； skulk， 一群害兽或坏人， 尤指狐狸或小偷；sloth， 一群熊； sord， 一群野鸭； sounder， 一群野公猪； stable， 住在同一处或属同一个人所有的一群马； swarm， 一群昆虫，如蚂蚁、蜜蜂或黄蜂， 尤指当它们迁往一个新的巢或蜂房时；troop， 一群动物、鸟或人，尤指在行进中时； warren 养兔场的一群动物，如兔子； watch 一群夜莺； wisp 一群鸟，尤指鹬鸟 参见同义词 crowd gathering 就是集合集会的意思，不特殊针对。
1) flock， flight， herd， drove， pack， gang， gaggle， bevy， brood (2) These nouns denote a number of animals, birds, or fish considered collectively, and some have huma
海燕扩写600字作文
海燕扩写600字作文英文回答：I have always been fascinated by the graceful and agile flight of swallows. Their ability to soar through the sky with such ease and grace is truly remarkable. Swallows, also known as sea swallows or martins, are small birds with long pointed wings and forked tails. They are known for their incredible aerial acrobatics and their ability to catch insects on the wing.Swallows are highly migratory birds, and they travel long distances between their breeding grounds and their wintering grounds. They are known to travel thousands of miles each year, crossing oceans and continents. Thisability to navigate such vast distances is truly awe-inspiring.One interesting fact about swallows is that they are known to return to the same nesting site year after year.They have a strong sense of loyalty to their breeding grounds and will often return to the same spot to raisetheir young. This is why you often see swallows building their nests in the same place, year after year.Another fascinating aspect of swallows is their unique feeding behavior. Swallows are insectivores, meaning they primarily feed on insects. They are known for their skillin catching insects on the wing, and they can often be seen darting and diving through the air in pursuit of their prey. This feeding behavior is not only efficient but also a spectacle to watch.中文回答：我一直对燕子优雅而敏捷的飞行深感着迷。
介绍翼龙的英文作文
介绍翼龙的英文作文English:Wings are a symbol of freedom, aren't they? I've always been fascinated by birds, how effortlessly they glide through the air, soaring above everything. But being human, I can't just sprout wings and take to the skies. That's where technology comes in. And one of the most fascinating creations inspired by the elegance of avian flight is the drone called "Eagle".Now, let me tell you about the Eagle. Picture this: a sleek, streamlined body, mimicking the aerodynamics of an eagle in flight. It's a marvel of engineering, equipped with cutting-edge technology that allows it to soar through the skies with precision and grace. With its wide wingspan and powerful propulsion system, the Eagle can cover vast distances in no time at all.But what sets the Eagle apart is its versatility. It'snot just a toy for hobbyists or a tool for surveillance. No, the Eagle is so much more. It's used in various fields,from agriculture to environmental monitoring, search and rescue operations to aerial photography. Its ability to access hard-to-reach areas and gather data makes it indispensable in many industries.Let me give you an example. Imagine a farmer trying to assess the health of his crops across acres of land.Instead of spending hours walking the fields, he can simply deploy the Eagle drone. It flies over the fields, capturing high-resolution images and analyzing plant health with precision. In minutes, the farmer has valuable insightsthat can help him make informed decisions about irrigation, pest control, and harvesting.And it's not just farmers who benefit from the Eagle's capabilities. Environmentalists use it to monitor wildlife populations, track deforestation, and assess the impact of climate change. Emergency responders rely on it to survey disaster areas quickly and efficiently, identifyingsurvivors and coordinating rescue efforts.The Eagle isn't just a machine; it's a game-changer.It's revolutionizing industries, saving lives, andprotecting the environment. With its wings of technology,it's bringing the freedom of flight to new heights.中文：翅膀总是代表着自由，不是吗？我一直对鸟类感到着迷，它们是如何毫不费力地在空中滑翔，高高飞过一切的。
四年级下册作文第二单元鹰翼
四年级下册作文第二单元鹰翼回答1:Title: The Eagle's Wing - Unit 2 Composition in Grade 4Introduction:In the second unit of the fourth-grade curriculum, we explore the fascinating topic of the eagle's wing. This unit delves into the magnificent characteristics and functions of an eagle's wing, both in English and Chinese.The Eagle's Wing:The eagle's wing is a remarkable feature that distinguishes it from other birds. With its broad and powerful wingspan, the eagle can soar through the sky with grace and precision. The wings of an eagle are designed for both strength and flexibility, enabling it to navigate various flight patterns effortlessly.English:The eagle's wing consists of strong and sturdy bones that provide structural support. These bones are lightweight, allowing the eagle to fly for long durations without getting tired. Additionally, the feathers on the wings play a crucialrole in flight. They are arranged in a specific pattern that helps the eagle maintain balance and stability during flight.Chinese:鹰翼由坚固的骨骼构成，为其提供结构支持。
鸟类的特征描写 英语作文
鸟类的特征描写英语作文英文回答：Birds are fascinating creatures that inhabit a wide range of ecosystems, from lush forests to arid deserts. With their unique physical adaptations and diverse behaviors, birds have captured the imagination of humansfor centuries. They are often admired for their beauty, their songs, and their ability to soar through the skies.One of the most striking characteristics of birds is their feathers. Feathers are lightweight, yet strong, and they provide birds with insulation, waterproofing, and protection from the elements. Feathers also come in a dazzling array of colors and patterns, which serve various functions, such as camouflage, courtship displays, and species identification.Birds possess a unique skeletal system that is lightweight and adapted for flight. Their bones are hollow,which reduces their overall weight, while still providing strength. Birds also have a powerful musculature,particularly in their wings and legs. This musculature allows them to generate the lift and thrust necessary for flight.Birds have a highly developed respiratory system thatis adapted for efficient oxygen uptake. Their lungs are connected to air sacs, which extend throughout their bodies. These air sacs help to reduce the density of their bodies, making flight easier. Birds also have a specialized circulatory system that allows them to deliver oxygen to their flight muscles quickly and efficiently.The digestive system of birds is adapted to their diet, which can vary widely depending on the species. Many birds are omnivores, eating a combination of plants and animals. Others are specialized feeders, such as raptors, which primarily hunt small mammals, or hummingbirds, which feedon nectar and pollen.Birds have a complex nervous system that allows them toexhibit a wide range of behaviors. They are capable of learning, problem-solving, and social interactions. Many birds also have specialized sensory organs that allow them to navigate and find food in their environment.The reproductive strategies of birds are diverse and vary depending on the species. Some birds are monogamous, while others are polygamous. Birds typically lay eggs, which are incubated by the parents until they hatch. The hatchlings are then cared for by their parents until they are old enough to fend for themselves.In conclusion, birds are a diverse and fascinating group of animals that have adapted to a wide range of habitats. Their unique physical adaptations, behaviors, and life histories make them a constant source of wonder and inspiration.中文回答：鸟类是一种有着广泛栖息地的迷人动物，从茂密的森林到干旱的沙漠。
描写鸟的唯美句子简短英文(精选2篇)
描写鸟的唯美句子简短英文(篇一) Title: Exquisite and Concise English Sentences Describing Birds1. Graceful wings flutter through the azure sky.2. Feathers glisten brightly under the morning sun.3. Their melodious tweets fill the XXr with joy.4. Birds ascend with elegance, dancing among the clouds.5. Through their harmonious choruses, nature celebrates.6. Wings extended, beauty takes flight.7. Gracefully gliding, they become the poets of the sky.8. Birds navigate the winds, guided by instinct.9. Their vibrant plumage adorns the branches like living artwork.10. In flight, they epitomize freedom and liberation.11. Delicate songsters spreading music with every tweet.12. Like delicate pXXntings, they color the sky.13. With nimble movements, they outmaneuver the wind.14. Whirling and soaring, they create their own ballet.15. In birds' beaks, nature's secrets are whispered.16. The sky is their playground, where they perform their aerial acrobatics.17. Swift wing strokes, like brushstrokes on a canvas.18. Mysterious and enchanting, they travel great distances.19. Elegant silhouettes pXXnt the horizon.20. Their presence brings a sense of tranquility to nature's stage.21. The symphony of their tweets creates a soothing melody.22. Masters of adaptation, they thrive in diverse ecosystems.23. With slender beaks, they carefully craft their nests.24. Chirping sweet lullabies to the newborns in their care.25. Radiant wings catch the sunlight, mesmerizing the beholder.26. Birds soar gracefully, emulating the dreams of humans.27. Fragile yet resilient, they embody the circle of life.28. Their wingspan symbolizes the boundless expanse of possibilities.29. Effortlessly gliding, they rewrite the rules of gravity.30. Colors of their feathers evoke emotions of awe and wonder.31. Perched on a branch, birds observe the world with wise eyes.32. Wings beat in harmony, creating symphonies in the sky.33. Their flight reminds us to soar beyond boundaries.34. Camouflaged in the foliages, they become nature's secret keepers.35. Swift as an arrow, they navigate through the tapestry of clouds.36. In their songs, they breathe life into the stillness of the forest.37. The beauty of their wings captivates all who gaze upon them.38. Nature's aviators, they dance with the wind in perfect rhythm.39. With every flap of their wings, they reveal the essence of freedom.40. Birds in flight are celestial messengers of nature's harmony.41. Soft feathers create a gentle tableau agXXnst the clear sky.42. Their innate navigation skills guide them through unknown territories.43. Majestic and nimble, they epitomize agility and grace.44. They embody resilience, to weather the harshest storms.45. Birds take flight, creating their own ethereal canvases.46. Morning chorus announces the beginning of a new day.47. Precise wing movements pXXnt trXXls of beauty in the XXr.48. Feathered friends bring color and life to nature's symphony.49. Through migration, they connect distant lands and cultures.50. In their delicate frames, the spirit of adventure takes wing.请您注意，以上内容仅供参考，您可以根据自己的理解和需要进行修改和发挥。
秋天的燕子作文
秋天的燕子作文Autumn is a beautiful season, where the leaves change colors and the air turns crisp. 秋天是一个美丽的季节，树叶变色，空气变得清新。
One of the most enchanting sights of autumn is the migration of swallows. 每年秋天，燕子们开始它们的迁徙之旅。
These swift and elegant birds travel long distances to escape the cold winter months. 燕子飞行迅速，优雅，它们为了逃避寒冷的冬季而飞往遥远的地方。
The sight of a flock of swallows flying in perfect formation against the backdrop of a setting sun is truly captivating. 在夕阳的映衬下，一群燕子完美地排列飞行的美景令人心驰神往。
As they soar through the sky, their high-pitched chirping fills the air, adding a melodic touch to the autumn landscape. 它们翱翔在天空中，尖锐的啁啾声充斥着空气，为秋天的景色添加了一抹旋律。
The sound of their wings flapping and their calls echoing across the fields create a sense of freedom and unity with nature. 它们振翅飞翔的声音和叫声回荡在田野间，让人感受到与大自然的自由和统一。
For centuries, swallows have been revered in many cultures as symbols of hope, freedom, and good fortune. 几个世纪以来，燕子在许多文化中被视为希望、自由和好运的象征。