by accident 偶然
on account of 因为，由于，为了……的缘故
in addition to 另外，加之in addition 除…之外（还）in the air 流传中
on （the／an） average 按平均值，通常
on the basis of 根据，在…的基础上
at best 充其量，至多
for the better 好转，向好的方向发展
on board 在船（车或飞机）上
out of breath 喘不过气来on business 因公，因事
in any case 无论如何，不管怎样
in case of 假如，如果发生；防备
in case 假使，以防（万一）in no case 决不，无论如何不
by chance 偶然，碰巧
in charge （of）负责，管理
（a）round the lock 日夜不停地
in common 共用的，共有的in conclusion 最后，总之on condition （that）如果
in consequence of 由于…的缘故，因为
on the contrary 正相反
in contrast with／to 与…对比起来，与…形成对比out of control 失去控制out of danger 脱离危险
have／gain access to 可以获得
take…into account 考虑到，顾及，体谅
take advantage of 占…的便宜，利用
pave the way （for）铺平道路，为…作准备
pay attention to 注意
do／try one‘s best 尽力，努力
get／have the best of 战胜
make the best of 充分利用get／have the better of 战胜，在…中占上风
catch one‘s breath 屏息；喘气，气喘；歇口气
take care 注意，当心
take care of 爱护，照料take a chance 冒险，投机take charge 开始管理，接管
keep…company 陪伴
take （a） delight in 以…为乐
make a difference 有影响，起（重要）作用
carry／bring／put into effect 使生效，实行，实现come／go into effect 生效，实施
take effect 生效，起作用catch sb‘s eye 被某人看到，引起某人注意
keep sb‘s head 保持镇静in the world 究竟，到底lose sb‘s head 慌乱，仓皇失措
lose heart 丧失勇气，失去信心
get／catch／take hold of 抓住，得到
keep house 管理家务
throw／cast light on／upon 使人了解，阐明
bear／keep in mind 记住have in mind 考虑到，想到make up one‘s mind 下定决心，打定主意
a series of 一系列,一连串
above all 首先,尤其是after all 毕竟,究竟ahead of 在...之前ahead of time 提前
all at once 突然,同时all but 几乎;除了...都all of a sudden 突然all over 遍及
all over again 再一次,重新
all the time 一直,始终
all the same 仍然,照样的
as regards 关于,至于anything but 根本不
as a matter of fact 实际上
apart from 除...外(有/无)
as a rule 通常,照例
as a result(of) 因此,由于
as far as...be concerned 就...而言
as far as 远至,到...程度
as for 至于,关于
as follows 如下
as if 好像,仿怫
as good as 和...几乎一样
as usual 像平常一样,照例
look after照顾，照看look ahead向前看
look forward to盼望
look in顺便来访
look at考虑
look back回头看
look down on/upon看不起look for寻找
look on观看
look out注意
look over把……看一遍look thrrough浏览
look to照看
look up好转
as to 至于,关于
all right 令人满意的;可以
as well 同样,也,还
as well as除...外(也),即...又aside from 除...外(还有)
at a loss 茫然,不知所措
at a time 一次,每次
at all 丝毫(不),一点也不
at all costs 不惜一切代价
at all events 不管怎样,无论如何
at all times 随时,总是
at any rate 无论如何,至少
at best 充其量,至多
at first 最初,起先
at first sight 乍一看,初看起来
at hand 在手边,在附近
at heart 内心里,本质上
