1. Typical of the grassland dwellers of the continent is the American
antelope, or pronghorn.
2. Of the millions who saw Haley’s comet in 1986, how many people will live
long enough to see it return in the twenty-first century.
3. Anthropologists have discovered that fear, happiness, sadness, and surprise
are universally reflected in facial expressions.
4. Because of its irritating effect on humans, the use of phenol as a general
antiseptic has been largely discontinued.
5. In group to remain in existence, a profit-making organization must, in the
long run, produce something consumers consider useful or desirable.
6. The greater the population there is in a locality, the greater the need
there is for water, transportation, and disposal of refuse.
7. It is more difficult to write simply, directly, and effectively than to
employ flowery but vague expressions that only obscure one’s meaning.
8. With modern offices becoming more mechanized, designers are attempting to
personalize them with warmer, less severe interiors.
9. The difference between libel and slander is that libel is printed while
slander is spoken.
10. The knee is the joints where the thigh bone meets the large bone of the
11. Acids are chemical compounds that, in water solution, have a sharp taste,
a corrosive action on metals, and the ability to turn certain blue vegetable
12. Billie Holiday’s reputation as a great jazz-blues singer rests on her
ability to give emotional depth to her songs.
12. Billie Holiday’s作为一个爵士布鲁斯乐杰出歌手的名声建立在能够赋予歌曲感情深度的能力。
13. Essentially, a theory is an abstract, symbolic representation of what is
conceived to be reality.
14. Long before children are able to speak or understand a language, they
communicate through facial expressions and by making noises.
15. Thanks to modern irrigation, crops now grow abundantly in areas where once
nothing but cacti and sagebrush could live.
16. The development of mechanical timepieces spurred the search for more
accurate sundials with which to regulate them.
17. Anthropology is a science in that anthropologists use a rigorous set of
methods and techniques to document observations that can be checked by others.
18. Fungi are important in the process of decay, which returns ingredients to
the soil, enhances soil fertility, and decomposes animal debris.
19. When it is struck, a tuning fork produces an almost pure tone, retaining
its pitch over a long period of time.
20. Although pecans are most plentiful in the southeastern part of the United
States, they are found as far north as Ohio and Illinois.
21. Eliminating problems by transferring the blame to others is often called
22. The chief foods eaten in any country depend largely on what grows best in
its climate and soil.
23. Over a very large number of trials, the probability of an event’s
occurring is equal to the probability that it will not occur.
24. Most substance contract when they freeze so that the density of a
substance’s solid is higher than the density of its liquid.
25. The mechanism by which brain cells store memories is not clearly
26. By the middle of the twentieth century, painters and sculptors in the
United States had begun to exert a great worldwide influence over art.
27. In the eastern part of New Jersey lies the city of Elizabeth, a major
shipping and manufacturing center.
28. 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.
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。
29. Alexander Graham Bell once told his family that he would rather be
remembered as a teacher of the deaf than as the inventor of the telephone.
29. Alexander Graham Bell曾告诉家人，他更愿意让后人记住他是聋子的老师，而非电话的发明者。
30. Because its leaves remain green long after being picked, rosemary became
associated with the idea of remembrance.
31. Although apparently rigid, bones exhibit a degree of elasticity that
enables the skeleton to withstand considerable impact.
32. That xenon could not FORM chemical compounds was once believed by
33. Research into the dynamics of storms is directed toward improving the
ability to predict these events and thus to minimize damage and avoid loss of
34. The elimination of inflation would ensure that the amount of money used in
repaying a loan would have the same value as the amount of money borrowed.
35. Futurism, an early twentieth-century movement in art, rejected all
traditions and attempted to glorify contemporary life by emphasizing the
machine and motion.
36. One of the wildest and most inaccessible parts of the United States is the
Everglades where wildlife is abundant and largely protected.
37. Lucretia Mott’s influence was so significant that she has been credited by
some authorities as the originator of feminism in the United States.
37. Lucretia Mott’s的影响巨大，所以一些权威部门认定她为美国女权运动的创始人。
38. The activities of the international marketing researcher are frequently
much broader than those of the domestic marketer.
39. The continental divide refers to an imaginary line in the North American
Rockies that divides the waters flowing into the Atlantic Ocean from those
flowing into the Pacific.
39.大陆分水岭是指北美洛矶山脉上的一道想象线，该线把大西洋流域和太平洋流域区分开来。 40. Studies of the gravity field
of the Earth indicate that its crust and mantle yield when unusual weight is
placed on them.
41. The annual worth of Utah’s manufacturing is greater than that of its
mining and farming combined.
42. The wallflower is so called because its weak stems often grow on walls and
along stony cliffs for support.
43. It is the interaction between people, rather than the events that occur in
their lives, that is the main focus of social psychology.
44. No social crusade aroused Elizabeth Williams’ enthusiasm more than the
expansion of educational facilities for immigrants to the United States.
44.给美国的新移民增加教育设施比任何社会运动都更多的激发了Elizabeth Williams的热情。 45. Quails typically have
short rounded wings that enable them to spring into full flight instantly when
disturbed in their hiding places.
46. According to anthropologists, the earliest ancestors of humans that stood
upright resembled chimpanzees facially, with sloping foreheads and protruding
46.根据人类学家的说法，直立行走的人的鼻祖面部轮廓与黑猩猩相似，额头后倾，眉毛突出。 47. Not until 1866 was the fully
successful transatlantic cable finally laid.
48. In his writing, John Crowe Ransom describes what he considers the
spiritual barrenness of society brought about by science and technology.
48. John Crowe Ransom在他的著作中描述了他认为是由科学技术给社会带来的精神贫困。
49. Children with parents whose guidance is firm, consistent, and rational are
inclined to possess high levels of self-confidence.
50. The ancient Hopewell people of North America probably cultivated corn and
other crops, but hunting and gathering were still of critical importance in