职称英语理工类新增
2012年职称英语理工类阅读理解新增文章(含练习解析及译文)
2012年职称英语理工类新增文章阅读理解（6篇）第六篇Making Light of1 Sleep第十九篇Graphene's Superstrength1*第三＋八篇"Life Form Found" on Saturn's Titan*第四十篇Teaching Math, Teaching Anxiety+第四＋五篇Teaching Math, Teaching Anxiety+第四十六篇Ants Have Big Impact on Environment as "Ecosystem Engineers" 注：1、+表示A级文章；*表示B即文章；其他为C级文章2、阅读理解3、2012年词汇部分与2011年教材相比未作任何变化阅读理解第六篇Making Light of1 SleepAll we have a clock located inside our brains. Similar to your bedside alarm clock，your internal clock2 runs on a 24-hour cycle. This cycle，called a circadian rhythm，helps control whenyou wake，when you eat and when you sleep.Somewhere around puberty，something happens in the timing of the biological clock. Theclock pushes forward，so adolescents and teenagers are unable to fall asleep as early as they used to. When your mother tells you it's time for bed，your body may be pushing you to stay up3 for several hours more. And the light coming from your computer screen or TV could be pushing you to stay up even later.This shift4 is natural for teenagers. But staying up very late and sleeping late can get your body's clock out of sync with the cycle of light and dark5. It can also make it hard to get out of bed in the morning and may bring other problems，too. Teenagers are put in a kind of a gray cloud6when they don't get enough sleep，says Mary Carskadon，a sleep researcher at Brown University in Providence，RI7 .It affects their mood and their ability to think and learn.But just like your alarm clock，your internal clock can be reset. In fact，it automatically resetsitself every day. How? By using the light it gets through your eyes.Scientists have known for a long time that the light of day and the dark of night play important roles in setting our internal clocks. For years，researchers thought that the signals that synchronize the body's clock8were handled through the same pathways that we use to see.But recent discoveries show that the human eye has two separate light-sensingsystems. One system allows us to see. The second system tells our body whether it's day or night.词汇：circadian/s3:'keidiən/ adj. 昼夜节奏的，生理节奏的adolescent/ædəu'lesənt/ n．青少年；adj．青少年的puberty/ 'pju:bəti/ n．发育；青春期sync/siŋk/ n. （口语）同步；和谐，协调synchronize/'siŋkrənaiz / V.（使）同时发生；（使）同步注释：1.make light of ：轻视，不在乎。
2011职称
下面是2011年阅读理解和完形填空新增文章的目录，供大家在复习时进行对照。
综合类阅读理解部分新增3篇(与2010职称英语教材对比)B级*第三十八篇Excessive Demands on Young People对年轻人的过高期望综合类完型填空部分新增3篇(与2010职称英语教材对比)B级*第十二篇Sport or Spectacle竞技还是表演?综合类教材中完型填空题型错误提醒：1、第十三篇英文暂无译文。
2、第十三篇中文译文实为第十五篇英文的译文。
3、第十五篇中文译文，大家可忽略不计，因英文已在教材删除。
复习重点仍应该放在词汇选项、阅读理解、完型填空三大题型上。
（一）阅读理解题型复习策略：关注新增文章：大家要利用这段时间把2011年新增的文章（新增文章列表见下文），尤其是本类别新增的文章要仔细认真的进行背诵和复习，在背诵文章时，应注意以下三点：（1）背诵每个题目的答案，不能只记ABCD（2）关注文章的中文内容，为换题做准备；（3）要全面重点背诵三个类别中新增的15篇文章，防止串考现象。
（二）完型填空题型复习策略：大家在复习完形填空题型时，应注意以下几点：（1）完型填空题型为题库出题，不需要做课外题目，综合类、理工类、卫生类串考情况比较少，各级别复习重点，综合类学生要扩大复习范围。
（2）复习要有层次感：把握住复习重点（3）复习程度把握：每篇文章的中文意思一定要全部了解，不能只记标题。
文章空白处反复练习，语法现象熟记。
（三）词汇选项题型的复习策略大家可以利用2月份这段时间集中进行同义词的积累和记忆，同时每天利用一定的时间练习进行查字典，对于基础较差的考生，建议抽时间坚持每天可以练习10—20对左右，这样有利于大家全面攻克词汇选项题型。
（四）其他题型的复习策略：阅读判断、概括大意与完成句子和补全短文三个题型，由于题目难度较大，且根据往年出题规律，一般不出教材内的内容，分值所占比重较小。
建议考生在复习过程中主要以掌握解题技巧为主，通过一些习题进行技巧的灵活应用。
职称英语理工a
职称英语理工A简介职称英语理工A是针对理工类人员的一个职称英语考试科目，主要测试考生在理工学科背景下的英语语言能力。
参加该考试的考生通常为工程师、科研人员或其他相关专业人员。
在该科目中，考生需要通过阅读、听力、写作等多个环节来展示自己的英语能力。
考试内容1. 阅读理解阅读理解是职称英语理工A考试的重点部分之一。
考生需要阅读一篇英文文章，并回答相关的问题。
这些文章通常与科技、工程、创新等领域有关。
对于理工类人员来说，具备阅读和理解科技文献的能力是很重要的，因此在准备考试时，考生需要注重科技文献的阅读和理解能力的提升。
2. 听力理解听力理解是考察考生对英语听力的能力。
考生需要听取一段英语录音，并回答相关问题。
这些录音通常与科技、工程、创新相关，需要考生能够准确听出关键信息，并作出正确的判断和回答。
3. 词汇与语法词汇与语法是职称英语理工A考试中不可忽视的部分。
在这部分内容中，考生需要掌握一定的词汇量，并了解英语语法的基本规则。
理工类人员需要具备使用科学术语和技术术语的能力，在准备考试时，考生可以通过词汇记忆和语法学习来提升自己的成绩。
4. 写作写作是考察考生写作能力的一部分。
在职称英语理工A考试中，写作题目通常与科技、工程、创新等领域相关。
考生需要根据题目要求，清晰、准确地表达自己的观点，并展示出较好的英语写作能力。
备考建议1.提前准备：职称英语理工A考试需要一定的准备时间，提前规划备考时间是很重要的。
考生可根据自己的时间安排，在备考期间逐渐提升自己的英语能力。
2.阅读科技文献：对于理工类人员来说，阅读科技文献是必不可少的。
通过阅读科技文献，考生可以了解一些相关领域的专业术语和表达方式，提高自己的阅读理解能力。
3.听力训练：考生可以通过听英语新闻、英语讲座等方式来进行听力训练，提高自己的听力理解能力。
4.积累词汇与语法：词汇量和语法知识是职称英语理工A考试中的重要因素。
考生可以通过背单词、学习语法知识等方式来积累自己的词汇量和语法水平。
职称英语理工a[001]
![职称英语理工a[001]](https://img.taocdn.com/s3/m/3a6b7420571252d380eb6294dd88d0d233d43c9c.png)
职称英语理工A一、介绍职称英语是由中国教育部主管的全国统一考试，旨在评价各行业人员在英语方面的专业能力。
理工类职称英语是职称英语考试的一个重要类别，主要针对从事理工类工作的人员。
本文将为大家介绍职称英语理工A类的考试内容和要求，并给出备考建议，希望能为广大理工类人员在职称英语考试中取得好成绩提供一些帮助。
二、考试内容1. 听力理解听力理解是职称英语理工A类考试的第一部分，考察考生对一些科技、工程、环境等方面的相关内容进行听力理解能力。
主要包括听力选择题、听力填空题等形式。
备考建议：平时应多听科技、工程、环境等方面的英语资料，提高对此类内容的听力理解能力。
2. 阅读理解阅读理解是职称英语理工A类考试的第二部分，考察考生对科技、工程、环境等相关领域的英语文章进行阅读理解能力。
主要包括阅读选择题、阅读填空题、阅读判断题等形式。
备考建议：平时应多读一些科技、工程、环境方面的英语文章，提高对此类内容的阅读理解能力。
3. 综合知识和应用能力综合知识和应用能力是职称英语理工A类考试的第三部分，主要考察考生在科技、工程、环境等领域的综合知识和应用能力，包括词汇、语法、句子理解等方面。
备考建议：平时应多积累科技、工程、环境等领域的词汇和相关知识，同时也要熟悉一些常用的科技、工程、环境类的英语表达方式。
4. 写作能力写作能力是职称英语理工A类考试的第四部分，主要考察考生在科技、工程、环境等领域的写作能力，包括图表描述、文章写作等形式。
备考建议：平时应多练习科技、工程、环境类的写作，提高自己在此领域的写作能力。
三、备考建议1.制定合理的备考计划，将考试内容分阶段学习和复习，确保每个部分都有足够的时间来掌握；2.阅读相关领域的英语资料，如科技、工程、环境类的英文书籍、期刊、论文等，培养自己的阅读理解能力；3.增加听力训练量，可以听听英文广播、新闻、演讲等，提高自己的听力理解能力；4.多做题，熟悉考试的题型和答题技巧，培养自己的应试能力；5.制定写作计划，每天练习写作，提高自己在科技、工程、环境等领域的写作能力；6.制定复习计划，每周复习一次已经学过的知识点，巩固记忆。
2011年职称英语完型填空新增文章译文---理工类
2011年职称英语完型填空新增文章译文---理工类运动的年轻人智商更高理A瑞典歌德堡大学健康科学研究院和该校校医院的一项最新研究表明，身体健康的年轻人智商更高，进入大学学习的可能性也更高。
研究结果发表在美国国家科学院学报上。
这项研究的取样样本是1950-1976年入伍的120万新兵。
这些新兵报到时接受了体能测试和智能测试，研究人员对这两类测试数据进行了分析。
研究表明，健康的体能和优秀的只能测试结果之间的联系很明显。
最突出的就是科学思维和语言理解能力与身体健康有关。
但是智商测试结果中只是健康在起作用，而与力量无关。
“身体健康是指，一个人心肺功能好，能将充分的氧气源源不断地输入给大脑，”瑞典歌德堡大学健康科学研究院教授和瑞典歌德堡大学健康科学研究院校医院首席内科医师Michael Nilsson如是说，“也许这就是为什么智商测试结果与健康之间存在明显联系，而与肌肉力量无关的原因之一。
我们还发现生长因子也很重要。
”通过研究双胞胎的数据，研究人员可以得出结论，智商差异来自后天的环境因素而不是先天的基因，身体健康，智商越高。
“我们还发现，在15-18岁之间加强身体锻炼的青少年往往认知能力也较强，”瑞典歌德堡大学健康科学研究院研究员，Aby健康中心医师Maria Aberg说，“倘若情况果然如此，那么体育应成为学校中重要的一门学科，而且如果我们想要学好数学和其他理论学科，体育课是非常有必要的。
”研究人员还将新兵服兵役入伍报到时的体格测试和智商测试的结果与他们后来生活中的社会经济地位进行了比较。
那些18岁时身体健康的人学历更高，很多都能胜任高要求的工作。
吸烟会加重青少年的抑郁情绪理B有些青少年可能会一口接一口地吸烟来消除抑郁，进行所谓的“自我治疗”。
然而加拿大Toronto和Montreal大学的科学家却发现，事实上，吸烟会加重某些青少年的抑郁情绪。
“这项研究是检验吸烟是否可以给青少年带来精神欢愉的几项研究之一，”首席研究员Michael Chaiton如是说，他是Toronto大学Ontario烟草研究组织的助理研究员，“尽管吸烟能在短时间能起到自我治疗的作用，能振奋精神，但根据青少年自我报告的情况，我们发现，从长远看，吸烟的青少年往往有更多的抑郁症状。
职称英语1
2011年理工类新增内容第二篇World Crude Oil Production May Peak a Decade Earlier Than Some Predict In a finding that may speed efforts to conserve(保护，保存) oil，scientists in Kuwait predict that world conventional crude oil production will peak in 2014.This prediction is almost a decade earlier than some other predictions. Their study is in ACS’Energy&Fuels.Ibrahim Nashawi and colleagues point out that rapid growth in global oil consumption has sparked a growing interest in predicting "peak oil". "Peak oil" is the point where oil production reaches a maximum and then declines. Scientists have developed several models to forecast this point，and some put the date at 2020 or later. One of the most famous forecast models is called the Hubbert model.It assumes that global oil production will follow a bell shaped curve.A related concept is that of "Peak Oil." The term "Peak Oil" indicates the moment in which world wide production will peak，afterwards to start on irreversible(不可逆的，不可改变的) decline.The Hubbert model accurately predicted that oil production would peak in the United States in 1970.The model has since gained in popularity and has been used to forecast oil production worldwide.However，recent studies show that the model is insufficient to account for more complex oil production cycles of some countries. Those cycles can be heavily influenced by technology changes，politics，and other factors，the scientists say.The new study describes development of a new version of the Hubbert model that provides a more realistic and accurate oil production forecast. Using the new model，the scientists evaluated the oil production trends of 47 major oil-producing countries，which supply most of the world’s conventional crude oil.They estimated that worldwide conventional crude oil production will peak in 2014，years earlier than anticipated. The scientists also showed that the world’s oil reserves are being reduced at a rate of 2.1 percent a year. The new model could help inform energy-related decisions and public policy debate，they suggest.词汇：irreversible adj.不可逆的，不可改变的 crude oil原油spark v.闪耀;激发;鼓舞insufficient 不充分的，不足的 curve n.曲线练习：1.Which of the following is closest in meaning to the word "sparked" appearing in paragraph 2 ?A.flashedB.stimulatedC.changedD.ended2.The term "a bell shaped curve" appearing in paragraph 2 indicates that global oil production willA.take the shape of a flat curve.B.keep growing.C.keep declining.D.start to decline after global oil production peaks.3.Which of the following is NOT true of the Hubbert model?A.It successfully predicted that oil production peaked in the U.S.in 1970.B.It has been used to predict oil production in many countries.C.It is insufficient to explain oil production cycles in some countries.D.It provides a very realistic and accurate oil production.4.What is the major achievement of the new study mentioned in the last paragraph?A.It predicts global oil production will peak in 2014.B.It predicts oil production will decline in 47 countries.C.It confirms further the effectiveness of the Hubbert model.D.It discovers a new gend of worldwide oil production.5.Who develop the new version of the Hubbert model ?A.American scientists.B.Kuwaiti scientists.C.British scientists.D.Scientists of 47 major oil-producing countries.答案与题解：1.B2.D3.D4.A5.B第六篇Weaving with LightIn the Sierra Madre mountain range of west central Mexico1，the native Huichol people2 live much the way their ancestors did-without electricity. That's because it's too expensive to string power lines3 to the remote mountain areas where they live. To help support themselves，the Huichol create beautiful artwork. They sell their art in cities hundreds of miles away from their villages. And without electricity-at home or on the road，they can only work during daylight hours. When it gets dark，they must stop whatever they’re doing.Now，a team of scientists，designers，and architects is using4 new technologies to provide the Huichol with light after the sun sets The scientists' technique involves weaving tiny electronic crystals into fabrics that can be made into clothes，bags，or other items.By collecting the sun’s energy during the day，these lightweight fabrics provide bright white light at night. Their inventors have named the fabrics “Portable Lights. ” Portable Lights have the potential to transform the lives of people without electricity around the world，says project leader Sheila Kennedy.“Our invention，”Kennedy says，“came from seeing how w e could transform technology we saw every day in the United States and move it into new markets for people who didn’t have a lot of money.”At the core of5 Portable Light technology are devices called high-brightness light-emitting diodes，or HB LEDs6.These tiny lights appear in digital clocks，televisions，and streetlights.LEDs are completely different from the light bulbs. Most of those glass bulbs belong to a type called incandescent lights. Inside，electricity heats a metal coil to about 2,200 degrees Celsius. At that temperature，bulbs give off light we can see.Ninety percent of energy produced by incandescent lights，however，is heat - and invisible. With all that wasted energy，bulbs bum out quickly. They are also easily broken.LEDs，on the other hand，are like tiny pieces of rock made up of molecules that are arranged in a crystal structure. When an electric current passes through an LED，the crystal structure produces light. Unlike incandescent bulbs，they can produce light of various colors. Within an LED，the type of molecules and their particular arrangement determines what color is produced.词汇：Portable adj.轻便的，手提式的incandescent adj.白灼的Light-emitting diode(LED) 发光二极管 coil n.线圈，卷，圈 Bulb n.灯泡;球状物 molecule n.分子注释：1.Sierra Madre mountain range of west central Mexico：墨西哥中西部的马德雷山脉。
职称英语考试《理工类》章节练习题精选及答案0517-21
职称英语考试《理工类》章节练习题精选及答案0517-211、BudgetA budget is a spending plan. It can help you spend money wisely. It can do this by cutting out wasteful spending. Of course, preparing a budget takes planning, and following a budget takes will power. Your budget should meet your family's needs and income.The first step in creating a budget is to set your goals. What does your family need and wants. You must know this to work out the details of the budget. Keep goals realistic, in terms of income available. Then decide which goals are the most important.The next step is estimating family income. Before you can plan wisely, you need to know how much money you have to spend! Write down all the money you expect to receive (wages, savings, interest, etc.) during the planned budget period.After you have calculated how much money will be available, itis time to estimate expenses. List all of your family expenses.If you are not satisfied with what you got for your money, look carefully at your spending. Studying your records will show where overspending has occurred. It will also point out poor buying habits.It is also a good idea to set aside a small amount of money for emergencies. Every family has small emergencies: a blown tire, a broken device, or the need for minor medical care.The writer suggests that it is a good idea to set aside some money because____.【单选题】A.you probably will not be able to follow your budgetB.people usually spend more than they plan to doC.things can happen unexpectedlyD.others may want to borrow some money from you正确答案:C答案解析:从原文最后的“It is also a good idea to set aside a small amount of money for emergencies. Every family has small emergencies”可以知道，每个家庭都会有一些意外情况发生，所以有必要准备一小笔资金作为备用金。
理工类职称英语试题及答案
理工类职称英语试题及答案理工类职称英语试题及答案第1部分：词汇选项(第1～15题，每题1分，共15分)下面每个句子中均有1个词或短语划有横线，请为每处划线部分确定1个意义最为接近的选项。
1 I'd very much like to know what your aim in life isA thoughtB ideaC goalD plan2 The policemen acted quickly because lives were at stake.A in dangerB in difficultyC in despairD out of control3 Practically all animals communicate either through sounds or through soundless codes.A CertainlyB ProbablyC AlmostD Absolutely4 Mary rarely speaks to Susan.A slowlyB seldomC weaklyD constantly5 I'm working with a guy from London.A teacherB studentC friendD man6 You'd better put these documents in a safe placeA darkB secureC guardedD banned7 The courageous boy has been the subject of massive media coverageA extensiveB continuousC instantD quick8 The town is famous for its magnificent buildingsA high-riseB modernC ancientD splendid9 The great change of the city astonished all the visitorsA surprisedB scaredC excitedD moved10 Jack packed up all the things he had accumulated over the last ten yearsA futureB farC pastD near11 Would you please call my husband as soon as possible?A visitB phoneC consultD invite12 We had a long conversation about her parents.A speechB questionC talkD debate13 The chairman proposed that we stop the meetingA statedB announcedC demandedD suggested14 Obviously these people can be relied on in a crisisA lived onB depended onC believed inD joined in15 There is always excitement at the Olympic Games when an athlete breaks a recordA beatsB maintainsC matchesD tries第2部分：阅读判断(第16～22题，每题1分，共7分)下面的短文后列出了7个句子，请根据短文的内容对每个句子做出判断：如果该句提供的是正确信息，请选择A;如果该句提供的是错误信息，请选择B;如果该句的信息文中没有提及，请选择C.Importance of Children's Oral HealthFebruary is National Children's Dental (牙齿的)Health Month，but in children good oral care is critical every day. The first comprehensive study on the nation's oral health，released recently by the Office of the U.S. Surgeon General，calls dental and oral disea ses a “silent epidemic (流行病)，” even in children. The report states that more than 51 million school hours are lost each year to dental-related illness. In fact，a recent study pointed to dental care as the most common unmet health need among American children.To help counter this，the American Academy of Periodontology (牙周病学)(AAP)is launching an effort to educate children and parents about the prevention of dental diseases in children.“This is important because oral problems can impact self-esteem for children and lead to problems of eating，speaking and attending to learning，” said Michael McGuire，president of the AAP.Common dental problems seen in children are cavities (龋洞)and gingivitis (龈牙)，which are found in the majority of U.S. children. “When these pr oblems are not caught early and treated，they can develop into more severe problems and cause unnecessary suffering，” said McGuire “However，much of the time，oral problems are avoidable problems.”In the Rio Grande Valley in Texas，a group of more than 120 dentists volunteers to deliver dental care to thousands of low-income children each year with its Mobile Dental Unit that travels from school to school.“According to the Surgeon General's Report，about 37 percent of children have not had a dental visit before starting school，” said McGuire. “When children don't see dentists theymiss the opportunity to have problems caught early before they develop into larger，more expensive problems to treat，and parents miss the opportunity to learn how to promote good oral habits in their children.”16 Only in February should attention be paid to children's oral healthA RightB WrongC Not mentioned17 Dental and oral diseases are common in both adults and childrenA RightB WrongC Not mentioned18 Boys miss more school hours each year due to dental-related illnessA RightB WrongC Not mentioned19 Oral problems in children can develop into more severe problems.A RightB WrongC Not mentioned20 Oral problems can not be avoided in any wayA RightB WrongC Not mentioned21 The low-income children are very grateful to the dentists.A RightB WrongC Not mentioned22 Some children have never seen a dentist before starting school.A RightB WrongC Not mentioned第3部分：概括大意与完成句子(第23～30题，每题1分，共8分)下面的短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第1～4段每段1选择个最佳标题;(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。
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写在最前面的关于30分题+15分1. +表示A级文章；*表示B即文章；其他为C级文章，考哪一级就看哪一级的内容，别的级别的题目完全不用看。
2. 每个级别新增阅读理解2篇完型填空2篇（今年以前完形填空只新增一篇），考试的时候，这两篇阅读理解必考一篇，文章完全一样，但是问题及答案不一定完全一样，所以仅仅记住答案是不可靠的，一定要结合后面的翻译把这篇文章看懂。
那么这里5道题目15分必定能拿到。
然后完型填空，先说今年以前，只新增一篇完型填空，这篇完型填空必考，只是留空的位置不会完全一样，大约有40%左右的留空位置是一样，所以光背答案是没得用的，一定要把文章看熟。
当然今年由于每个级别新增了2篇完型填空，那么考试的时候肯定也是2选1考一篇。
这里15道题15分也很容易能拿到。
3. 词汇有15道题，替换同义词，找本字典翻翻，这15分也不难，至少12分能拿到吧。
其他的题能拿多少分就看各位的英语底子了。
做最坏的打算，剩下的题目还有55分，按瞎蒙25%的概率能拿到13.75分，加上前面的45分大约也有58分左右，所以要完全靠瞎蒙的朋友考试前多扶扶老奶奶过马路，多积累点人品吧。
4. 以上只是投机取巧的方法，各位有时间的话还是花点时间复习下，但是考前一定要把新增的题目掌握好，就算英语底子好的朋友也起码可以节约不少考试时间。
5. 本人职称英语A\B\C级都是这样考过的，每年的规律都是一样的。
从客观角度说，每年的职称英语考试书都不便宜，新增的内容也不多，如果新增的东西里面没有价值，那么那本书还有谁买？那本书可是考试中心出的，亲！最后，祝大家考试顺利！2012年职称英语理工类新增文章阅读理解（6篇）……………………3页第六篇 Making Light of1 Sleep第十九篇 Graphene's Superstrength1*第三＋八篇 "Life Form Found" on Saturn's Titan*第四十篇 Teaching Math, Teaching Anxiety+第四＋五篇 Teaching Math, Teaching Anxiety+第四十六篇Ants Have Big Impact on Environment as "Ecosystem Engineers"完形填空（6篇）……………………20页第三篇 Germs on Banknotes第十篇 Chicken Soup for the Soul：Comfort Food Fights Loneliness *第十一篇 Climate Change Poses Major Risks for Unprepared Cities*第十二篇 Free Statins With Fast Food Could Neutralize Heart Risk+第十三篇 Solar Power without Solar Cells+第十五篇“Liquefaction” Key to Much of Japanese Earthquake Damage注：1、+表示A级文章；*表示B即文章；其他为C级文章；2、阅读理解，请参见第3页；完形填空，请参见第20页；3、2012年词汇部分与2011年教材相比未作任何变化。
阅读理解*第三＋八篇 "Life Form Found" on Saturn's TitanScientists say they have discovered hints of alien life1 on the Saturn's moon2. The discovery of a sort of life was announced after researchers at the US space agency,NASA3,analyzed data from spacecraft Cassini4,which pointed to,the existence of methane-based form of life on Saturn's biggest moon.Scientists have reportedly discovered clues showing primitive alien beings are"breathing" inTitan's dense atmosphere filled with hydrogen.They argue that hydrogen gets absorbed before hitting Titan's planet-like surface covered with methane lakes and rivers. This,they say,points to the existence of some"bugs"5consuming the hydrogen at the surface of the moon less than half the size of the Earth."We suggested hydrogen consumption because it's the obvious gas for life to consume on Titan,similar to the way we consume oxygen on Earth,"says NASA scientist Chris McKay."If these signs do turn out to be a sign of life,it would be doubly exciting because it would represent a second form of life independent from water-based life on Earth."To date,scientists have not yet detected this form of life anywhere,though there are liquid-water-based microorganisms on Earth that grow well on methane or produce it as a waste product. On Titan, where temperatures are around 90 Kelvin6(minus 290 degrees Farenheit),a methanebased organism would have to use a substance that is liquid as its medium for living processes, but not water itself. Water is frozen solid on Titan's surface and much too cold to support life as we know it.Scientists had expected the Sun's interactions with chemicals in the atmosphere to produce a coating of acetylene on Titan's surface. But Cassini detected no acetylene on the surface.The absence of detectable acetylene on the Titan's surface can very well have a non-biological explanation,said Mark Allen,a principal investigator7of the NASA Titan team."Scientific conservatism suggests that a biological explanation should be the last choice after all non-biological explanations are addressed,"Allen said. "We have a lot of work to do to rule out8 possible non-biological explanations. It is more likely that a chemical process,without biology,can explain these results."词汇：Saturn /'sætən/ n．土星 methane/'mi:θein/ n．甲烷，沼气Titan/'taitən/ n．土卫六 acetylene/ə'setili:n/ n．乙炔alien/'eiljən/ n．外星人；adj．外星球的；相异的conservatism/kən'sʒ:vətizəm/ n．保守主义,守旧注释：1.hints of alien life：外星生命迹象。
2.the Saturn's moon：指土卫六（Titan) 。
土卫六又称泰坦星，是土星卫星中最大的一颗。
3.NASA：美国国家航空航天局的缩写，全称是： National Aeronautics and SpaceAdministration。
4.spacecraft Cassini：卡西尼号探测器，以出生于意大利的法国天文学家卡西尼的名字命名，其任务是环绕土星飞行，对土星及其大气、光环、卫星和磁场进行深人考察。
1997 年10 月15日，重六吨的“卡西尼”号星际探测器被发射飞往土星的轨道。
这是上世纪发射的最后一艘行星际探测的大飞船。
“卡西尼”号用了将近七年时间，在2004 年7月1日飞达土星轨道。
5.bugs：微生物。
非正式口语表达，所以使用了引号。
6.Kelvin：可翻译成“绝对温度”。
Kelvin Scale ，绝对温标，开氏温标，是由Kelvin 勋爵于19世纪中叶发明的温度计量方法，其零度相当于摄氏一273. 15" C ，被认为是宇宙中最低温度。