对
6. comment on.. .的评论
7. at least至少
从8. expect of / from.. .中期待
9 .报告9. in return
关于10. the survey on.. .的调查
11. differ in.. .点不同
12 .从emerge from.. .
13. be satisfied with.. .很满意
14. play ... roles发挥...的作用
15. lean over ...弯下身子蹲在…上
16. turn out的结果，证明如下
17. in silence在沉默中
18. burst into laughter突然大笑起来
19. concentrate on.. .集中注意力… ...
20. be replaced by已被...取代
21.for the purpose of.. . ...
什么是distinguish...from.. .区分... ...
23 .与communicate with.. .交流
24. one another彼此，彼此
25. by means of ...用...的方法
26. at the approach of ...到达的时候
和differ from ...不一样
28 .举一个for instance的例子
29 .分割divide ... into ...是 ...
30. enable sb. to do.. .使某人能做某事