1 a host of 大量
2 a test for检测目的
3 a test on对……进行测试
4 a test with检测手段
5 above all 最重要的;
6 according to根据
7 achieve equilibrium取得平衡
8 achieve one’s purpose达到目的
9 achieve success 获得成功
10 achieve victory获得胜利
11 act on 遵照┄行动，作用于;
12 act on对…有影响
13 add up to 总计，合计
14 add… to 把…加到….
15 adhere to 坚持，奉行
16 after all 毕竟，均不合题意;
17 agree on对……取得一致意见
18 agree to同意
19 agree with sb.同意某人的话
20 along with 和┄一道,和┄一起;
21 alternate (with)交替;
22 amount to 合计,共计;
23 an equal to与……相当的人/物，(地位)相同的人
24 and yet然而
25 anything but 一点也不;
26 anything like像……那样的东西
27 anywhere near接近于
28 apart form除……之外尚有
29 apply to 向……申请，适用于
30 appreciation of对……的欣赏/赞赏
31 argue against 反对
32 as a result of作为……的结果，由于
33 as a result(作为结果，因此)表结果，用不用逗号隔开看情况而定;
34 as a whole 作为一个整体，整个看来
35 as far as …/are concerned就……而言
36 as for至于，就…方面说
37 as if好像，仿佛
38 as soon as一~就~
39 as though好像，仿佛
40 as to 至于，关于;
41 as well也，一样
42 as yet迄今，到目前为止
43 aside from 除┄之外;
44 associate … with…由……联想到……，把……联系起来
45 association with与……的交往
46 at a disadvantage处于不利地位
47 at a loss不知所措
48 at a time每次，一次
49 at all 丝毫,根本;
50 at any moment即使，随时。
