熟读100句英文,记7000单词(完美版)(最便宜的版本(5)

最好的版本。有生词和汉译。

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.

trial ['trai l] n. 试验；审讯；努力；磨炼

probability [,pr b 'bil ti] n. 可能性；机率；[数] 概率

event [i'vent] n. 事件，大事；项目；结果

occur [ 'k :] vi. 发生；出现；存在

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。

24. Most substance contract when they freeze so that the density of a substance's solid is higher than the density of its liquid.

substance ['s bst ns] n. 物质；实质；资产；主旨

contract ['k ntrækt, k n'trækt] vi. 收缩；感染；订约vt. 感染；订约；使缩短

freeze [fri:z] vi. 冻结；冷冻；僵硬 vt. 使…冻住；使…结冰

density ['dens ti] n. 密度

大多数物质遇冷收缩，所以他们的密度在固态时高于液态。

25. The mechanism by which brain cells store memories is not clearly understood.

mechanism ['mek niz m] n. 机制；原理

brain [brein] n. 头脑，智力；脑袋

cell [sel] n. 细胞

大脑细胞储存记忆的机理并不为人明白。

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.

到了二十一世纪中叶，美国画家和雕塑家开始在世界范围内对艺术产生重大影响。

27. In the eastern part of New Jersey lies the city of Elizabeth, a major shipping and manufacturing center. 伊丽莎白市，一个重要的航运和制造业中心，坐落于新泽西州的东部。

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.

infirmary [in'f :m ri] n. 医务室；医院；养老院

institution [,insti'tju: n] n. 制度；建立；（社会或宗教等）公共机构；习俗

completely [k m'pli:tli] adv. 完全地，彻底地；完整地

female ['fi:meil] adj. 女性的

staff [stɑ:f, stæf] n. 职员

Elizabeth Blackwell，美国第一个女医生，创建了员工一直为女性的纽约诊所。

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.

deaf [def] adj. 聋的

inventor [in'vent ] n. 发明家；[专利] 发明人；创造者

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