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a host of 大量
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a test for检测目的
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a test on……进行测试
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a test with检测手段
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above all 最重要的;                   
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according to根据
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achieve equilibrium取得平衡
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achieve one’s purpose达到目的
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achieve success 获得成功
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achieve victory获得胜利
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act on 遵照┄行动,作用于;       
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act on有影响
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add up to 总计,合计
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add… to 加到….
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adhere to 坚持,奉行; 
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after all 毕竟,均不合题意;     
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agree on……取得一致意见
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agree to同意
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agree with sb.同意某人的话
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along with 和┄一道,和┄一起;         
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alternate  (with)交替;
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amount to 合计,共计;   
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an equal to……相当的人/物,(地位)相同的人
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and yet然而
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anything but  一点也不; 
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anything like……那样的东西
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anywhere near接近于
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apart form……之外尚有
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apply to ……申请,适用于
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appreciation of……的欣赏/赞赏
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argue against 反对
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as a result  of作为……结果,由于
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as a result(作为结果,因此)表结果,用不用逗号隔开看情况而定; 
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as a whole 作为一个整体,整个看来
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as far as …/are concerned……而言
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as for至于,就方面说
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as if好像,仿佛
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as soon as河南人力资源和社会保障厅网一~~           
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as though好像,仿佛
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as to 至于,关于;                   
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as well也,一样
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as yet迄今,到目前为止
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aside from 除┄之外;
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associate … with………联想到,把联系起来
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association with……的交往
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at a disadvantage处于不利地位
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at a loss不知所措
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at a time每次,一次
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at all 丝毫,根本
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at any moment即使,随时。 
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at first 首先,开始的时候;             
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at large未被捕获的,大多数;           
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at last 终于,最终;
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at least至少
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at length 最终,详细地;           
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at most最多
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at no time从不,决不
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at one time曾经,从前曾
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at the cost of……为代价
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at the least 至少;               
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at times有时,间或
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at…speed……的速度
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attend on 照顾,侍候
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attribute … to ……归于
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back  up 后退,支持;
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base on 基于
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be able to能够,胜任
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be about to正打算
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be accustomed to习惯于
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be associated with  ……有关,与……有关系
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be aware of 意识到;             
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be capable of 有能力干; 
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be caught 遇到,陷入
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be committed to被交给┄,答应承担┄义务;
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be confined to 限制在,局限于;
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be confined/be restricted……限制
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be dedicated to 奉献,献给;       
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be devoted to 被用于,贡献给
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be directed to指向,针对
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be drawn to 被┄所吸引;