1. Libraries made education possible, and education in its turn added to libraries; the growth of knowledge followed a kind of compound-interest law, which was greatly enhanced by the invention of printing.
2. If they can each be trusted to take such responsibilities, and to exercise such initiative as falls within their sphere, then administrative overhead will be low.
如果他们每个人都能予以信任承担这样的职责，并在他们所管辖的范围内发挥主动性，那么管理费用就会降低。
3. There are probably no question we can think up that can’t be answered, sooner or later, including even that matter of consciousness.
迟早可能不存在我们想得出但解答不了的问题，甚至包括我们意识的问题。
4. The curtain was rung down in that phase of history, at least, by the sudden invention of the hydrogen bomb, of the ballistic missile and of rockets that can be aimed to hit the moon.
至少由于氢弹、弹道导弹和登月火箭出人意料地发明，那个历史时期宣告结束了。
5. Studies of the Weddell seal in the laboratory have described the physiological mechanisms that allow the seals to cope with the extreme oxygen deprivation that occurs during its longest dives, which can extend 500 meters below the ocean’s surface and last for over 70 minutes. (三个定语从句)
6. The renaissance of the feminist movement began during the 1950’s led to the Stasist school, which sidestepped the good bad dichotomy and argued that frontier women lived lives similar t the lives of women in the East.
7. Tom, the book’s protagonist, took issue with a man who doted on his household pet yet, as a slave merchant, thought “nothing of separating the husband from the wife, the parents from the children”.
8. We are not conscious of the extent to which work provide the psychological satisfaction that can make the difference between a full and an empty life.
我们不了解工作给人们提供的能把充实的生活与空虚的生活区分开来的心理满足的程度有多大。
9. Thus, the unity that should characterize the strong system is developed by affording opportunity for diversity, which appears to be essential if education is to develop in consideration of the needs of children and youth.
10. Automobiles have been designed which operate on liquid hydrogen, but these system give rise to seemingly unavoidable problems arising from the handling of a cryogenic liquid.
虽然已经设计出液氢驱动的汽车，但是这些系统带来一些由如何处理低温液体而引发的似乎难以回避的问题。
11. Behaviorists suggest that the child who is raised in an environment where there are many stimuli which develop his or her capacity for appropriate responses will experience greater intellectual development.
12. While there are almost as many definitions of history as there are historians, modern practice most closely conforms to one that sees history as the attempt to recreate and explain the significant events of the past.
13. While this boundary does not mark the outer limit of a State’s territory, since in international law the territorial sea forms part of a State’s territory, it does represent the demarcation(分界，定界，界限)between that maritime area(internal waters) where other States enjoy no general rights, and those maritime areas (the territorial sea and other zones) where other States do enjoy certain general rights.
14. He finds that students who were easy to teach because they succeeded in putting everything they had been taught into practice, hesitate when confronted with the vast untouched area of English vocabulary and usage which falls outside the scope of basic textbooks.
15. The reader who peruses (细读（正式）) with some attention the following pages will have occasion to see that both operational and mental aspects of physics have their place, but that neither should be stressed to the exclusion of the other.
16. The public is unhappy about the way society is going, and its view, fueled in part by the agendists and the media, seems to be that judicial (司法的)decisions unacceptable to them, regardless of the evidence or the law, will slow or change social directions.
17. But I would like to do the same with the acclaim too, by using this moment as a pinnacle from which I might be listened to by the young men and women already dedicated to the same anguish(痛苦) and travail(辛苦), among whom is already that one who will some day stand here where I am standing.
