词组 | at a time |
释义 | at a timeadv. phr.At once; at one time; in one group or unit; together. 一下子;每次;一次;同时。◆ He checked them off one at a time as they came in.他们进来时,他一个一个地加以核对。◆ He ran up the steps two at a time.他两步并一步地跑上了台阶。 |
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