at sight of 一看见

at stake 在危险中；危如累卵

at table 在餐桌边，在进餐时

at that 就那样，就这样；而且

at that rate 那样的话；照那种情形

at the age of phr.在…岁时

at the beginning of phr.…起初，开始

at the cost of 以…为代价

at the end of phr.在...结尾,到...尽头

at the expense of 归…付费

at the head of phr.在...的最前

at the instance of 应…之请，经…的提议

at the latest 最迟，至迟

at the mercy of 在…支配下

at the moment phr.此刻

at the same time phr.同时

at the thought of 一想起…(就)

at this rate 这样的话，照此速度

at times phr.有时,偶尔

at work phr.在工作

at worst 在最坏的情况下

attach importance to 认为重要

attach oneself to 依附；参加党派