21.act on 奉行，按照…行动;act as 扮演;act for 代理
22. adapt oneself to(=adjust oneself to)使自己适应于
23. adapt…(for)(=make sth. suitable for a new need)改编，改写(以适应新的需要)
24.in addition(=besides)此外，又，加之
25. in addition to(=as well as，besides，other than)除…外
26. adhere to(=abide by，conform to，comply with，cling to，insist on，persist in，observe，opinion，belief)粘附;坚持，遵循
27. adjacent(=next to，close to)毗邻的，临近的
28.adjust..(to)(=changes lightly)调节;适应
29.admit of(=be capable of，leave room for)…的可能，留有…的余地
30.in advance(before in time)预告，事先
31. to advantage 有利的，使优点更加突出地
32. have an advantage over 胜过;have the advantage of 由于…处于有利条件;have the advantage of sb. 知道某人所不知道的事
33. take advantage of(=make the best of，utilize，make use of，profit from， harness)利用
34. agree with 赞同(某人意见);agree to 同意
35.in agreement(with)同意，一致
36. ahead of 在…之前，超过…
37. in the air 1)不肯定，不具体;2)在谣传中
38. above all(=especially，most important of all)尤其是，最重要的.
39.in all(=counting everyone or everything，altogether)总共，总计
40. after all 毕竟，到底;(not)at all 一点也不;all at once(=suddenly)突然;once and for all 只此一次;above all 最重要的;first of all 首先;all in all 大体上说;be all in 累极了;all but 几乎
