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出处：按学科分类—语言、文字 辽宁人民出版社《英汉辞典》第77页（1212字）

【释义】：

①(地点)在：at the station在火车站．at home在家．at a meeting在会上．②(表示方向)：aim at the enemy向敌人瞄准．rush at the enemy向敌人冲去．What are you looking at?你在看什么?Somebody is knocking at the door．有人在敲门．Don’tlaugh at him．别笑他．③(表示原因)：The baby was frightened at the noise．这婴儿听到响声吓了一跳．④(时间)在：at four o′clock在四点钟．at this moment在这时．at the same time同时．at times时常．at night在夜里．at noon在中午．at the beginning of the month在月初．He joined the Red Army at fifteen．他十五岁就参加了红军．⑤按照，依照：at sb．’s invitation根据某人的邀请．We did it at his request．我们是按照他的请求做的．at will随意，任意．⑥(表示温度、高度、速度)在，以：at 20 degrees below zero在零下二十度．at the altitude of one thousand metres在一千公尺高度．at the rate of 200 kilometres an hour以每小时二百公里的速度．at full speed全速．at a snail’s pace爬行．⑦(表示状态)处于：be at war(peace)处于战争(和平)状态．at ease安心，平静．He was at a loss what to say．他不知说什么好．⑧(表示从事)：He is at work．他在工作．What is he at now?他在干什么?He works hard at English．他努力学习英语．⑨(表示代价、费用)以，用：sell at a high price高价出售．at the cost of以…作代价．at all costs不惜任何代价．at the risk of冒…危险．⑩(与good，quick，slow等形容词连用)在…方面：be good at swimming擅长游泳．He is quick at figures．他算得很快．⑾(表示距离)：The picture looks better at a distance．这张画离远看更好．⑿(表示极点)：at first最初．at last最后．at least至少．at most至多也不过…，大不了…．at the best至好也不过…，充其量…．