51. Unlike most of the world's volcanoes, they are not always found at the boundaries of the great drifting plates that make up the earth's surface; on the contrary, many of them lie deep in the interior of a plate. [参考译文] 跟世界上的大多数火山不同的是，它们(热点)并不总是在由构成地球表面巨大漂流板块之间的边界上出现；相反，它们中有许多位于一个板块较纵深的内部。
52. The relative motion of the plates carrying these continents has been constructed in detail, but the motion of the plates with respect to another cannot readily be translated into motion with respect to the earth's interior.
[参考译文] 携带这些大陆板块的相对运动已经能够被详细地表述出来，但是这些板块相对于另一些板块的运动还不能轻易地解释为它们相对于地球内部的运动。
53. As the dome grows, it develops seed fissures (cracks); in at least a few cases the continentmay break entirely along some of these fissures, so that the hot spot initiates the formation of a new ocean.
[参考译文] 暂缺
54. While warnings are often appropriate and necessary--the dangers of drug interactions, for example--and many are required by state or federal regulations, it isn't clear that they actually protect the manufacturers and sellers from liability if a customer is injured.
[参考译文] 尽管警告常常是适当而且必须的--比如对于药物相互作用的危险提出 警告--许多警告还是按州或联邦政府规定要求给出的，然而(我们)并不清楚，如果顾客受到伤害时，这些警告是不是确实可以使得生产者和销售者豁免责任。
55. At the same time, the American Law Institute--a group of judges, lawyers, and academics whose recommendations carry substantial weight--issued new guidelines for tort law stating that companies need not warn customers of obvious dangers or bombard them with a lengthy list of possible ones.
[参考译文] 与此同时，美国法律研究所--由一群法官、律师和理论专家组成，他们的建议分量极重--发布了新的民事伤害法令指导方针，宣称公司不必提醒顾客注意显而易见的危险，也不必连篇累牍地一再提请他们注意一些可能会出现的危险。
56. In the past year, however, software companies have developed tools that allow companies to "push" information directly out to consumers, transmitting marketing messages directly to targeted customers.
[参考译文] 但是，在过去的一年间，软件公司已经开发出工具，使得公司可以直接将信息"推出"给顾客，直接把营销讯息传递给目标顾客。
57. The examples of Virtual Vineyards, Amazon.com, and other pioneers show that a Web site selling the right kind of products with the right mix of interactivity, hospitality, and security will attract online customers.
[参考译文] 像Virtual Vineyards，Amazon．com这样的先驱网站表明，一个将交互性、 热情服务和安全性合理结合以销售同类商品的网址是可以吸引网上客户注意的。
58. An invisible border divides those arguing for computers in the classroom on the behalf of students' career prospects and those arguing for computers in the classroom for broader reasons of radical education reform.
[参考译文] 有些人为了学生的就业前景为教室里放置电脑而辩，有些人为教育的彻 底改革中更为广泛的理由为教室里放置电脑而辩，这两群人之间有一条无形的界线。
59. Rather, we have a certain conception of the American citizen, a character who is incomplete if he cannot competently access how his livelihood and happiness are affected by things outside of himself.
[参考译文] 我们更应该具有的是作为美国公民的某种观念，这个公民人物如果不能很恰当地认识到自己的生存和幸福是如何受到自身之外的事物的影响， 那么其公民特征就是不完整的。
60. Besides, this is unlikely to produce the needed number of every kind of professional in a country as large as ours and where the economy is spread over so many states and involves so many international corporations.
[参考译文] 另外，在我们这么一个大国里，经济延展到这么多的州、涉及到这么多的国际公司，因而要按照数量培养出所需的各类专业人员是不大可能的
61.But,for a small group of students, professional training might be the way to go since well-developed skills, all other factors being equal, can be the difference between having a job and not.
[参考译文] 但是，对一个小部分学生来说，职业教育也是条可取的路径。因为在其他因素相同的情况下，技能的娴熟是得到工作与否的关键。
62. Declaring that he was opposed to using this unusual animal husbandry technique to clone humans, he ordered that federal funds not be used for such an experiment-although no one had proposed to do so--and asked an independent panel of experts chaired by Princeton President Harold Shapiro to report back to the White House in 90 days with recommendations for a national policy on human cloning.
[参考译文] 他宣布自己反对使用这种非同寻常的畜牧繁殖技术来克隆人类，并下令．不准联邦政府基金用于做此类试验--尽管还没有人建议这么做--他还请一个以普林斯顿大学校长哈罗得·夏皮罗为首的独立的专家组在90天内向白宫汇报关于制定有关克隆人的国家政策的建议。
63. In a draft preface to the recommendations, discussed at the 17 May meeting, Shapiro suggested that the panel had found a broad consensus that it would be "morally unacceptable to attempt to create a human child by adult nuclear cloning".
[参考译文] 在5月17日的会议上所讨论的这份建议书的序言草案中，夏皮罗提出，专家组已经达成广泛共识，那就是"试图通过成人细胞核克隆来制造人类幼儿的做法在道德上是不可接受的"。
64. Because current federal law already forbids the use of federal funds to create embryos (the earliest stage of human offspring before birth) for research or to knowingly endanger an embryo's life, NBAC will remain silent on embryo research.
[参考译文] 因为现今的联邦法律已经禁止使用联邦基金克隆胚胎(人类后裔在出生 前的最早阶段)用于研究或者有意地威胁胚胎的生命，NBAC在胚胎研究上将保持沉默。
65. If experiments are planned and carried out according to plan as faithfully as the reports in the science journals indicate, then it is perfectly logical for management to expect research to produce results measurable in dollars and cents.
[参考译文] 如果试验是像科学杂志上的报告所示的那样如实地根据计划规划和实施的话，那么对管理层来说，期待研究能够产生可以用金钱衡量的结果是完全合理的作者: 幽幽草 时间: 2007-5-29 16:45 标题: 六级长难句结构分析最新经典一百句(2)b
66. It is entirely reasonable for auditors to believe that scientists who know exactly where they are going and how they will get there should not be distracted by the necessity of keeping one eye on the cash register while the other eye is on the microscope.
67. Nor, if regularity and conformity to a standard pattern are as desirable to the scientist as the writing of his papers would appear to reflect, is management to be blamed for discriminating against the "odd balls" among researchers in favor of more conventional thinkers who "work well with the team."
68. The grand mediocrity of today--everyone being the same in survival and number of off- spring--means that natural selection has lost 80% of its power in upper-middle-class India compared to the tribe.
69. When a new movement in art attains a certain fashion, it is advisable to find out what its advocates are aiming at, for, however farfetched and unreasonable their principles may seem today, it is possible that in years to come they may be regarded as normal.
70. With regard to Futurist poetry, however, the case is rather difficult, for whatever Futurist poetry may be even admitting that the theory on which it is based may be right--it can hardly be classed as Literature.
71. But it is a little upsetting to read in the explanatory notes that a certain line describes a fight between a Turkish and a Bulgarian officer on a bridge off which they both fall into the river--and then to find that the line consists of the noise of their falling and the weights of the officers, "Pluff! Pluff!" A hundred and eighty-five kilograms."
72. The coming of age of the postwar baby boom and an entry of women into the male- domiated job market have limited the opportunities of teen-agers who are already questioning the heavy personal sacrifices involved in climbing Janpan's rigid social ladder to good schools and jobs.
73. Last year Mitsuo Setoyama, who was then education minister, raised eyebrows when he argued that liberal reforms introduced by the American occupation authorities after World WarII had weakened the "Japanese morality of respect for parents".
74. With economic growth has come centralization: fully 76 percent of Japan's 119 million citizens live in cities where community and the extended family have been abandoned in favor of isolated, tow-generation households.
75. If the tradition of ambition is to have vitality, it must be widely shared; and it especially must be highly regarded by people who are themselves admired, the educated not least among them.
76. Certainly people do not seem less interested in success and its signs now than formerly. Summer homes, European travel, BMWs--the locations, place names and name brands may change, but such items do not seem less in demand today than a decade or two years ago.
77. Instead, we are treated to fine hypocritical spectacles, which now more than ever seem in ample supply: the critic of American materialism with a Southampton summer home; the publisher of radical books who takes his meals in three-star restaurants; the journalist advocating participatory democracy in all phases of life, whose own children are enrolled in private schools.
78. No clear-cut distinction can be drawn between professional and amateurs in science: exceptions can be found to any rule. Nevertheless, the word "amateur" does carry a connotation that person concerned is not fully integrated into the scientific community and, in particular, may not share its values.
79. The trend was naturally most obvious in those areas of science based especially on a mathematical or laboratory training, and can be illustrated in terms of the development of geology in the United kingdom.
80. A comparison of British geological publications over the last century and a half reveals not simply an increasing emphasis on the primacy of research, but also a changing definition of what constitutes an acceptable research paper.
81. The overall result has been to make entrance to professional geological journals harder for a mateurs, a result that has been reinforced by the widespread introduction of refereeing, first by national journals in the 19th century and then by several local geological journals in the 20th century.
82. A rather similar process of differentiation has led to professional geologists coming together nationally within one or two specific societies, whereas the amateurs have tended either to remain in local societies or to come together nationally in a different way.
83. Sad to say, this project has turned out to be mostly low--level findings about factual errors and spelling and grammar mistakes, combined with lots of head--scratching puzzlement about what in the world those readers really want.
84. I believe that the most important forces behind the massive M&M wave are the same that underlie the globalization process: falling transportation and communication costs, lower trade and investment barriers and enlarged markets that require enlarged operations capable of meeting customers' demands.
85. A lateral move that hurt my pride and blocked my professional progress promoted me to abandon my relatively high profile career although, in the manner of a disgraced government minister, I covered my exit by claiming "I wanted to spend more time with my family."
86. I have discovered, as perhaps Kelsey will after her much-publicized resignation from the editorship of She after a build-up of stress, that abandoning the doctrine of "juggling your life", and making the alternative move into "downshifting brings with it far greater rewards than financial success and social status.
87. While in America the trend started as a reaction to the economic decline-after the mass redundancies caused by downsizing in the late ' 80s-and is still linked to the politics of thrift, in Britain, at least among the middle-class down shifters of my acquaintance, we have different reasons for seeking to simplify our lives.
88. For the women of my generation who were urged to keep juggling through the' 80s, down-shifting in the mid' 90s is not so much a search for the mythical good lift-growing your own organic vegetables, and risking turning into one-as a personal recognition of your limitations.
89. If you are part of the group which you are addressing, you will be in a position to know the experiences and problems which are common to all of you and it' 11 be appropriate for you to make a passing remark about the inedible canteen food or the chairman' s notorious bad taste in ties.
90. There are already robot systems that can perform some kinds of brain and bone surgery with submillimeter accuracy--far greater precision than highly skilled physicians can achieve with their hands.
91. But if robots are to reach the next stage of laborsaving utility, they will have to operate with less human supervision and be able to make at least' a few decisions for them- selves-goals that pose a real challenge.
92. But the human mind can glimpse a rapidly changing scene and immediately disregard the 98 percent that is irrelevant, instantaneously focusing on the monkey at the side of a winding forest road or the single suspicious face in a big crowd.
93. The OECD estimates in its latest Economic Outlook that, if oil prices averaged $22 a barrel for a full year, compared with $13 in 1998, this would increase the oil import bill in rich economies by only 0.25---0.5% of GDP.
94. One more reason not to lose sleep over the rise in oil prices is that, unlike the rises in the 1970s, it has not occurred against the background of general commodity-price inflation and global excess demand.
95. Although it ruled that there is no constitutional right to physician-assisted suicide, the Court in effect supported the medical principle of "double effect", a centuries-old moral principle holding that an action having two effects--a good one that is intended and a harmful one that is foreseen--is permissible if the actor intends only the good effect.
96. Nancy Dubler, director of Montefiore Medical Center, contends that the principle will shield doctors who "until now have very, very strongly insisted that they could not give patients sufficient mediation to control their pain if that might hasten death."
97. On another level, many in the medical community acknowledge that the assisted--suicide debate has been fueled in part by the despair of patients for whom modern medicine has prolonged the physical agony of dying.
98. It identifies the undertreatment of pain and the aggressive use of "ineffectual and forced medical procedures that may prolong and even dishonor the period of dying" as the twin problems of end--of--life care.
99. In other words, there is a conventional story line in the newsroom culture that provides a backbone and a ready-made narrative structure for otherwise confusing new.
100. If it did, it would open up its diversity program, now focused narrowly on race and gender, and look for reporters who differ broadly by outlook, values, education, and class.
1. The American economic system is, organized around a basically private-enterprise, market-oriented economy in which consumers largely determine what shall be produced by spending their money in the marketplace for those goods and services that they want most.
[参考译文] 美国的经济是以基本的私有企业和市场导向经济为架构的，在这种经济中，消费者很大程度上通过在市场上为那些他们最想要的货品和服务付费来决定什么应该被制造出来。
2. Thus, in the American economic system it is the demand of individual consumers, coupled with the desire of businessmen to maximize profits and the desire of individuals to maximize their incomes, that together determine what shall be produced and how resources are used to produce it.
3. If, on the other hand, producing more of a commodity results in reducing its cost, this will tend to increase the supply offered by seller-producers, which in turn will lower the price and permit more consumers to buy the product.
4. In the American economy, the concept of private property embraces not only the ownership of productive resources but also certain rights, including the right to determine the price of a product or to make a free contract with another private individual.
5. At the same time these computers record which hours are busiest and which employers are the most efficient, allowing personnel and staffing assignments to be made accordingly. And they also identify preferred customers for promotional campaigns.
6. Numerous other commercial enterprises, from theaters to magazine publishers, from gas and electric utilities to milk processors, bring better and more efficient services to consumers through the use of computers.
7. Exceptional children are different in some significant way from others of the same age For these children to develop to their full adult potential, their education must be adapted to those differences.
8. The great interest in exceptional children shown in public education over the past three decades indicates the strong feeling in our society that all citizens, whatever their special conditions, deserve the opportunity to fully develop their capabilities.
9. It serves directly to assist a rapid distribution of goods at reasonable price, thereby establishing a firm home market and so making it possible to provide for export at competitive prices.
10. Apart from the fact that twenty-seven acts of Parliament govern the terms of advertising, no regular advertiser dare promote a product that fails to live up to the promise of his advertisements.
11. If its message were confined merely to information and that in itself would be difficult if not impossible to achieve, for even a detail such as the choice of the color of a shirt is subtly persuasive-advertising wound be so boring that no one wound pay any attention.
12. The workers who gets a promotion, the student whose grades improve, the foreigner who learns a new language-all these are examples of people who have measurable results to show for there efforts.
13. As families move away from their stable community, their friends of many years, their extended family relationships, the informal flow of information is cut off, and with it the confidence that information will be available when needed and will be trustworthy and reliable.
14. The individual now has more information available than any generation, and the task of finding that one piece of information relevant to his or her specific problem is complicated, time--consuming, and sometimes even overwhelming.
15. Expertise can be shared world wide through teleconferencing, and problems in dispute can be settled without the participants leaving their homes and/or jobs to travel to a distant conference site.
16. The current passion for making children compete against their classmates or against the clock produces a two-layer system, in which competitive A-types seem in some way better than their B type fellows.
17. While talking to you, your could-be employer is deciding whether your education, your experience, and other qualifications will pay him to employ you and your "wares" and abilities must be displayed in an orderly and reasonably connected manner.
18. The Corporation will survive as a publicly funded broadcasting organization, at least for the time being, but its role, its size and its programs are now the subject of a nation wide debate in Britain.
19. The debate was launched by the Government, which invited anyone with an opinion of the BBC--including ordinary listeners and viewer to say what was good or bad about the Corporation, and even whether they thought it was worth keeping.
20. The change met the technical requirements of the new age by engaging a large profess signal element and prevented the decline in efficiency that so commonly spoiled the fortunes of family firms in the second and third generation after the energetic founders.
21. Such large, impersonal manipulation of capital and industry greatly increased the numbers and importance of shareholders as a class, an element in national life representing irresponsible wealth detached from the land and the duties of the landowners: and almost equally detached from the responsible management of business.
22. Towns like Bournemouth and Eastbourne sprang up to house large "comfortable" classes who had retired on their incomes, and who had no relation to the rest of the community except that of drawing dividends and occasionally attending a shareholders' meeting to dictate their orders to the management.
23. The "shareholders" as such had no knowledge of the lives, thoughts or needs of the workmen employed by the company in which he held shares, and his influence on the relations of capital and labor was not good.
24. The paid manager acting for the company was in more direct relation with the men and their demands, but even he had seldom that familiar personal knowledge of the workmen which the employer had often had under the more patriarchal system of the old family business now passing away.
25. Among the many shaping factors, I would single out the country's excellent elementary schools: a labor force that welcomed the new technology； the practice of giving premiums to inventors; and above all the American genius for nonverbal, "spatial" thinking about things technological.
26. As Eugene Ferguson has pointed out, "A technologist thinks about objects that can not be reduced to unambiguous verbal descriptions: they are dealt with in his mind by a visual, nonverbal process...The designer and the inventor.., are able to assemble and manipulate in their minds devices that as yet do not exist".
27. Robert Fulton once wrote, "The mechanic should sit down among levers, screws, wedges, wheel, etc, like a poet among the letters of the alphabet, considering them as an exhibition of his thoughts, in which a new arrangement transmits a new idea".
28. In the last three chapters, he takes off his gloves and gives the creationists a good beating. He describes their programs and, tactics, and, for those unfamiliar with the ways of creationists, the extent of their deception and distortion may come as an unpleasant surprise.
29. On the dust jacket of this fine book, Stephen Jay Gould says: "This book stands for reason itself." And so it does-and all wound be well were reason the only judge in the creationism/evolution debate.
30. After six months of arguing and final 16 hours of hot parliamentary debates, Australia's Northern Territory became the first legal authority in the world to allow doctors to take the lives of incurably ill patients who wish to die.
31. Some have breathed sighs of relief, others, including churches, right-to-life groups and the Australian Medical Association, bitterly attacked the bill and the haste of its passage. But the tide is unlikely to turn back.
32. In Australia- where an aging population, life-extending technology and changing community attitudes have all played their partother states are going to consider making a similar law to deal with euthanasia.
33. There are, of course, exceptions. Small--minded officials, rude waiters, and ill mannered taxi drivers are hardly unknown in the US. Yet it is an observation made so frequently that it deserves comment.
34. We live in a society in which the medicinal and social use of substances (drugs) is pervasive: an aspirin to quiet a headache, some wine to be sociable, coffee to get going in the morning, a cigarette for the nerves.
35. Dependence is marked first by an increased tolerance, with more and more of the substance required to produce the desired effect, and then by the appearance of unpleasant withdrawal symptoms when the substance is discontinued.
36. "Is this what you intended to accomplish with your careers?" Senator Robert Dole asked Time Warner executives last week. "You have sold your souls, but must you corrupt our nation and threaten our children as well?"
37. "The test of any democratic society, he wrote in a Wall Street Journal column', "lies not in how well it can control expression but in whether it gives freedom of thought and expression the widest possible latitude, however disputable or irritating the results may sometimes be..."
38. During the discussion of rock singing verses at last month's stockholders' meeting, Levin asserted that "music is not the cause of society's ills" and even cited his son, a teacher in the Bronx, New York, who uses rap to communicate with students.
39. Much of the language used to describe monetary policy, such as "steering the economy to a soft landing" of "a touch on the brakes" , makes it sound like a precise science. Nothing could be further from the truth.
40. Economists have been particularly surprised by favorable inflation figures in Britain and the United States, since, conventional measures suggest that both economies, and especially America's, have little productive slack.
41. The most thrilling explanation is, unfortunately, a little defective. Some economists argue that powerful structural changes in the world have upended the old economic models that were based upon the historical link between growth and inflation.
42. The Aswan Dam, for example, stopped the Nile flooding but deprived Egypt of the fertile silt that floods left-all in return for a giant reservoir of disease which is now so full of silt that it barely generates electricity.
43. New ways of organizing the workplace--all that re-engineering and downsizing--are only one contribution to the overall productivity of an economy, which is driven by many other factors such as joint investment in equipment and machinery, new technology, and investment in education and training.
44. His colleague, Michael Beer, says that far too many companies have applied re-engineering in a mechanistic fashion, chopping out costs without giving sufficient thought to long-term profitability.
45. Defenders of science have also voiced their concerns at meetings such as "The Flight from S.cience and Reason" , held in New York City in 1995, and "Science in the Age of (Mis) information, which assembled last June near Buffalo.
46. A survey of news stories in 1996 reveals that the antiscience tag has been attached to many other groups as well, from authorities who advocated the elimination of the last remaining stocks of smallpox virus to Republicans who advocated decreased funding for basic research.
47. The 'true enemies of science, argues Paul Ehrllch of Stanford University, a pioneer of environmental studies, are those who question the evidence supporting global warming, the depletion of the ozone layer and other consequences of industrial growth.
48. This development--and its strong implication for US politics and economy in years ahead--has enthroned the South as America's most densely populated region for the first time in the history of the nation's head counting.
49. Often they choose--and still are choosing--somewhat colder climates such as Oregon, Idaho and Alaska in order to escape smog.crime and other plagues of urbanization in the Golden State.
50. As a result, California's growth rate dropped during the 1970's, to 18.5 percent--little more than two thirds the 1960's growth figure and considerably below that of other Western states.
