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) (=change slightly)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…;…………….             ahead of time 提前.
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.