1. It is obvious (to sb.) that 从句  对某人来说，……是显然的
2. confuse A with/and B 把A和B相混淆
3. be confused by sth. 被…….搞糊涂了
4. in confusion 困惑的；困窘地
5. compare. . .with. . . 和……比较
6. compare. . .to. . . 把……比作
7. comepared to/with 和……相比（作状语）
8. variety of=varieties of 各种各样的
9. differ from sb./sth. 与某人或某物有区别，相异
10. differ in. . . 在某方面不同
11. have sth.in common (with sb./sth.)  和某人或某物有相同之处
12. have a lot/much/a great deal in common with. . .与……有很多共同之处
13. have nothing in common with. . . 与……没有共同之处
14. in common with sb./sth. 和……一样
15. make a difference 有关系；有重要性；
16. make some difference to. . . 对……有些关系
17. make much difference to. . . 关系重大；有重大影响
18. make no difference to. . . 对……没有关系
19. be similar to 与……相似
20. be similar in 在……方面相似
21. have some/much difficulty（in）doing sth. 做某事有些/很多困难
22. have some/much difficulty with sth. 做某事有一些/很多困难
23. with difficulty 困（艰）难地
24. lead to sb.doing sth. 使得某人做某事
25. lead sb.to do sth. 使得某人去做某事
26. announce sth.to sb. 向某人宣布某事
=announce to sb.sth 向某人宣布某事
27. add. . .to. . . 把……加到……中
28. add to 增加
29. add up. . . 合计；加起来
30. add up to. . . 总计
31. make an announcement 发表声明，通知
32. at present 现在；目前
33. make an attempt to do sth. 试图做某事
34. make an attempt at doing sth. 试图（尝试）做某事
35. at one’s first attempt 第一次尝试
36. attempt at（doing）sth. 尝试（做）某事
37. in favour of 同意，支持，拥护
38. do sb.a favour 帮某人一个忙
39. ask sb.a favour =ask a favour of sb  请求某人帮忙
40. in sb.’s favour 有助于某人
41. refer to. . .as. . . 称……为……
42. refer to 参考
43. make (a) reference (s) to 提及，论及
44. now (that)+ 句子 由于；既然