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1.at the thought of一想到…
2.as a whole(=in general)就整体而论
3.at will随心所欲
4.(be)abundant in(be rich in;be well supplied with)富于，富有
5.access(to)(不可数名词)能接近，进入，了解
6.by accident(=by chance,accidentally)偶然地，意外
Without accident(=safely)安全地
7.of one’s own accord(=without being asked;willingly;freely)自愿地，主动地
8.in accord with与…一致；out of one’s accord with同…不一致
9.with one accord(=with everybody agreeing)一致地
10.in accordance with(=in agreement with)依照，根据，…一致
11.on one’s own account
1)为了某人的缘故，为了某人自己的利益
2)(=at one’s own risk)自行负责
3)(=by oneself)依靠自己
12.take…into account(=consideration)把…考虑进去
13.give sb.an account of说明，解释(理由)
14.account for(=give an explanation or reason for)解释，说明
15.on account of(=because of)由于，因为
16.on no account(=in no case,for no reason)绝不要，无论如何不要(放句首时句子要倒装)
17.accuse…of…(=charge…with;blame sb.for sth.;blame sth.on sb.;complain about)指控，控告
18.be accustomed to(=be in the habit of,be used to)习惯于
19.be acquainted with(=to have knowledge of)了解；(=to have met socially)熟悉
20.act on奉行，按照…行动；act as扮演；act for代理
21.adapt oneself to(=adjust oneself to)使自己适应于
22.adapt…(for)(=make sth.suitable for a new need)改编，改写(以适应新的需要)
23.in addition(=besides)此外，又，加之
24.in addition to(=as well as,besides,other than)除…外
25.adhere to(=abide by,conform to,comply with,cling to,insist on,persist in,observe,opinion,belief)粘附；坚持，遵循
26.adjacent(=next to,close to)毗邻的，临近的
27.adjust…(to)(=change slightly)调节；适应
28.admit of(=be capable of,leave room for)…的可能，留有…的余地
29.in advance(before)预告，事先
30.to advantage有利地，使优点更加突出地
31.have an advantage over胜过
have the advantage of胜过，优于，比…处于有利地位
32.take advantage of(=make the best of,utilize,make use of,profit from,harness)利用
33.agree with赞同(某人意见)；agree to同意
34.in agreement(with)同意，一致
35.ahead of在…之前；ahead of time提前
36.in the air
1)不肯定，不具体.
2）在谣传中
37.above all尤其是，首先
38.in all(=counting everyone or everything,altogether)总共，总计
39.after all毕竟，到底；(not)at all一点也不；all at once(=suddenly)突然；once and for all一劳永逸地；永远地，彻底地
first of all首先；all in all大体上说；all but几乎
40.allow for(=take into consideration,take into account)考虑到，估计到
41.amount to总计，等于
42.answer for sth.(undertake responsibility for,be liable for,take charge of)对…负责
43.conform oneself to使某人适应；conform one’s ideas to other’s使自己的思想和另一个人相一致
44.be anxious about为…焦急不安；或anxious for
45.apologize to sb.for sth.为…向…道歉
46.appeal to sb.for sth.为某事向某人呼吁
47.apply for申请
48.approve vt.批准
49.approve of(=consent to,be in favor of,favor,agree to)赞成
50.arise from(=be caused by)由…引起
51.arrange for sb./sth.to do sth.安排…做…
52.arrive on到达；arrive at到达某地(小地方)；arrive in到达某地(大地方)
53.be ashamed of(=feel shame,guilt or sorrow because of sth.done)以…为羞耻
54.assure sb.of sth.(=try to cause to believe or trust in sth.)向…保证，使…确信。
55.attach importance to重视
56.make an attempt at doing sth.(to do sth.)试图做…
57.attend to(=deal with；take care of)处理，照顾
58.attitude to/toward…对…的态度、看法
59.attribute…to…(=to believe sth.to be the result of…)把…归因于…，认为…是…的结果
60.on the average(=on average,on an average)平均
61.(be)aware of(=be conscious of,having knowledge or consciousness)意识到，知道
62.at the back of作…后盾；作为…背后的原因；在…之后
63.in the back of one’s mind在某人脑海深处；on the back of在不久之后；be flat on one’s back(=be ill in bed)卧病不起
64.at one’s back(=supporting or favoring sb.)支持，维护
65.turn one’s back on sb.(=turn away from sb.in an impolite way)不理睬(某人)，背弃，抛弃
66.behind one’s back背着某人(说坏话)
67.be based on/upon基于
68.on the basis of根据…，在…基础上
69.beat…at在…运动项目上打赢
70.begin with以…开始；to begin with(=first of all)首先，第一(经常用于开始语)
71.on behalf of(=as the representative of)以…名义
72.believe in(=have faith or trust in;consider sth./sb.to be true)相信，依赖，信仰。
73.benefit(from)受益，得到好处
74.for the benefit of为了…的利益(好处)
75.for the better好转
76.get the better of(=defeat sb.)战胜，在…中占上风
77.by birth在血统上；天生；give birth to生（孩子）；产生，引起
78.be to blame(for sth.)对（坏事）负有责任
79.in blossom开花(指树木)；be in blossom开花(强调状态)；come into blossom开花(强调动作)
80.on board到船上，在船上，上火车或飞机
81.boast of(or about)吹嘘
82.out of breath喘不过气来
83.in brief(=in as few words as possible)简言之
84.in bulk成批地，不散装的
85.take the floor发言
86.on business出差办事。
87.be busy with sth.忙于某事；be busy doing sth.忙于做某事
88.last but one倒数第二
89.but for(=without)要不是.表示假设
90.buy sth.for…用多少钱买
91.be capable of能够，有能力
be capable of being+过去分词是能够被…的
92.in any case无论如何
93.in case(=for fear that)万一
94.in case of(=in the event of)如果发生…
in the case of至于…，就…而言
95.in no case在任何情况下都不(放句首倒装句)
96.be cautious of谨防
97.center one’s attention on(=focus one’s attention on)把某人的注意力集中在…上
98.be sure of有自信心
99.make certain of sth./doing sth.确保(做某事)
100.by chance(=accidentally,by accident)偶然