28. Elizabeth Blackwell，美国第一个女医生，创建了员工一直为女性纽约诊所。
Elizabeth Blackwell, the first woman medical doctor in the United States, founded the New York Infirmary, an institution that has always had a completely female medical staff.

7. 简明，直接，有力的写作难于花哨，含混而意义模糊的表达。
It is more difficult to write simply, directly, and effectively than to employ flowery but vague expressions that only obscure one's meaning.

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13. 理论在本质上是对认识了的现实的一种抽象和符号化的表达。
Essentially, a theory is an abstract, symbolic representation of what is conceived to be reality.

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94. 确实，他们在探险中遇到了极具威胁性的困难和危险，而他们的装备会让一个现代登山者想一想都会浑身颤栗。不过他们并不是刻意去追求刺激的。
It is true that during their explorations they often faced difficulties and dangers of the most perilous nature, equipped in a manner which would make a modern climber shudder at the thought, but they did not go out of their way to court such excitement.

23. 在大量的实验中，某一事件发生的几率等于它不发生的几率。
Over a very large number of trials, the probability of an event's occurring is equal to the probability that it will not occur.

69. 雪对农民是一种帮助，因为它保持地层土壤的温度，使种子不致冻死。
Snow aids farmers by keeping heart in the lower ground levels, thereby saving the seeds from freezing.

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51. 使用精心挑选的无意义词汇，可以检验语言学科里许多基本的假定。
The use of well-chosen nonsense words makes possible the testing of many basic hypotheses in the field of language learning.

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47. 直到1866年第一条横跨大西洋的电缆才完全成功的架通。
Not until 1866 was the fully successful transatlantic cable finally laid.

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79. 根据默默无闻的小说制作优秀影片在美国由来已久，已经成为传统。
The practice of making excellent films based on rather obscure novels has been going on so long in the United States as to constitute a tradition.

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