1. on the average (=on average, on an average) 平均
2. (be) aware of (=be conscious of , having knowledge or consciousness)意識到,知道.
3. at the back of (=behind) 在後面
4. in the back of 在後部(裏面); on the back of 在後部(外面); be on ones back(=be ill in bed) 臥病不起.
5. at ones back(=supporting or favoring sb.) 支持,維護; have sb. at ones back 有支持, 有作後臺
6. turn ones back on sb. (=turn away from sb. in an impolite way) 不理睬(某人),背棄,拋棄
7. behind ones back 揹着某人(說壞話)
8. be based on / upon 基於
9. on the basis of 根據, 在基礎上
11. begin with 以開始. to begin with (=first of all) 首先, 第一(經常用於開始語)
12. on behalf of (=as the representative of) 以名義
13. believe in(=have faith or trust in; consider sth./sb. to be true) 相信,依賴,信仰.
14. benefit (from) 受益,得到好處.
15. for the benefit of 爲了的利益(好處)
16. for the better 好轉
17. get the better of (=defeat sb.) 打敗, 勝過.
18. by birth 在出生上,論出身,按血統 at birth 在出生時; give birth to 出生
19. blame sb. for sth. 因責備某人 . blame sth. on sb. 把推在某人身上
20. in blossom開花(指樹木) be in blossom開花(強調狀態) come into blossom開花(強調動作)
21. on board 到船上, 在船上, 上火車或飛機
22. boast of (or about) 吹噓
23. out of breath 喘不過氣來
24. in brief(=in as few words as possible)簡言之
25. in bulk 成批地,不散裝的
26. take the floor 起立發言
27. on business 出差辦事.
28. be busy with sth.於某事 。 be busy doing sth. 忙於做某事
29. last but one 倒數第二.
30. but for (=without) 要不是. 表示假設
31. buy sth. formoney 用多少錢買
32. be capable of 能夠, 有能力 be capable of being +過去分詞:是能夠被的
33. in any case(=for love or money, at any rate, at any price, at any cost, whatever happens; anyhow)無論如何
34. in case (=for fear that) 萬一;
35. in case of (=in the event of)如果發生萬一 in the case of 至於, 就而言
36. in no case在任何情況下都不(放句首倒裝句)
37. be cautious of 謹防
38. center ones attention on(=focus ones attention on) 把某人的注意力集中在上
39. be certain of (=be sure of) 有把握, 一定.
40. for certain of (=for sure )肯定地,有把握地
