at the foot of . at the bottom of,在…底部（脚下）
A temple stands at the foot of the mountain．山脚下有一座寺庙。
See explanatory notes at the foot of this page．参看本页下端的注解。
at the moment . at the present time； now此刻；目前（用于现在时态中）
I know the address well enough，but I can't think of it at the moment．我清楚地记得这个地址，可是这会儿怎么也想不起来了。
at the moment . then那时；那一刻（用于过去时态中）
I was busy at the moment．我那时很忙。
I was willing to lend him the book，but I hadn't it with me at the moment．我是愿意借给他那本书的，可是当时书不在我手边。
at the rate of .at the speed of 以…的速度
The car was running at the rate of one hundred kilometer per hour． 汽车以100公里的时速行驶。
at the rate of .以…的比率；以…的价格
I bought the oranges at the rate of seven jiao a jin．我以7角钱一斤的价格买了这些桔子。
at the right time. at the suitable time在适当的时候
You must learn to do the right thing at the right time．应该学会在适当的时候做适当的事情。
at the risk of. with the danger of；冒…之险；不顾…
He was determined to get there even at the risk of his life．他决心到那里去，即使是冒生命危险也在所不惜。
at the risk of being bankrupt， he invested all his money in the company．冒着破产的危险，他把所有的钱都投到公司去了。
at the same time. at the same moment； together 同时；一起
I know he is untruthful，but at the same time，I must admit he is a good worker．我知道，他不可信。但是同时我必须承认他是个好工人。
Don't all speak at the same time．大家不要同时说话。
at the same time. in spite of the fact；even though；however尽管如此；虽然；但是
It will cost a lot of money． at the same time，I think we shall need it and it will certainly be useful．这将花费好多钱，但是我认为我们需要它而且它一定会有用途的。
at the sight of .on seeing一看到…就
The boy ran towards his mother at the sight of a dog．那个男孩一看见狗就朝母亲跑去。
at times. sometimes；occasionally间或；有时
at times I saw her walking alone by the lake．我有时看到她独自在湖边散步。
at times I make mistakes when I speak English．我说英语有时有错。
at war 在交战中
The two countries were at war for eight years．这两个国家打了八年仗。
at will. 随意地
Gone for ever are the days when imperialism could trample small nations under foot at will．帝国主义任意把小国踩在脚下的日子已一去不复返了。
No one can do anything at will．谁也不能为所欲为。
He comes and goes at will．他来去自由。
at work. working； engaged in在工作；从事于
He is at work on a new book．他在写一本新书。
attach to fasten；be part of,粘上；贴上；附属于
Please attach the sample to the letter．请随信附上样品。
Attach the handle to the box．把这个把手装在盒子上。
This hospital is attached to a medical college．这家医院附属于一个医学院。
attach to belong to ； be attribute to属于 ；归于
No suspicion can be attached to the accountant．没有理由怀疑这位会计。
The main credit for the success of the test attaches to the thoroughness in their work．这次试验之所以成功，主要归功于他们工作中一丝不苟的精神。
No blame attaches to him for the accident．责任不在他身上。
attach to . join 参加
He attached himself to the group of climbers．他加入了爬山者的行列。
He attached himself to the Party．他入党了。
attach to 认为有（重要性）
Do you attach much importance to what he says？你认为他说的话重要吗？
attach to be appointed to 任命；被派遣到另一单位担任特定任务
Last week he was attached to chief manager．上星期他被任命为总经理。
attach to 深爱；依恋
She is deeply attached to her young brother．她深深地爱她的小弟。
He is foolishly attached to old customs．他愚蠢地沿习着旧习俗。
attend on . attend upon 侍候
The president is attended on by many followers and guards．总统身边有许多随从和卫士。
attend on . attend upon 照料
Lisa has been attending on her sick mother for years．丽莎多年来一直侍候在生病的母亲身旁。
attend on . attend upon 是…的必然结果
Success usually attends on one's efforts．成功是努力的结果。