- at worstadv.在最坏的情况下;
- at the start of在
- at the peak of在…高峰期;
- at the cost付出代价
- at the bottom在底部;
- at sight一看到…就;一经要求就，一出示就;
- at service在服役
- at seaadv.在大海上，迷茫，弄错;
- at maturity到期;
- at issue在审议[争论]中;
- at intervalsadv.不时，相隔一定距离;
- at great length详细地；细致地;洋洋洒洒;
- at first glance一看就，初看，乍看起来;
- at close quarters非常近;
- at birth出生时;
- at all risksadv.无论如何;
- at all costs不惜任何代价;不惜工本;
- at a loose endadv.闲着;没有事做;闲散;
- at a guess猜一下，粗略估计;
- at the top of one&在一个人的顶端
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