a)if someone deals with things one, three, ten etc at a time, they deal with them separately or in groups of three, ten etc 每次…
If you raise your hands, I’ll answer questions one at a time.
请你们举手,我会逐一回答你们的问题。
Frank took the stairs two at a time.
弗兰克一步跨两级台阶。
b)if something happens for hours, days, months etc at a time, it continues for several hours, months etc 连续
Because of his work, he’s often away for weeks at a time.
因为工作的原因,他经常连续几周都不在家。
Examples from the Corpus
... at a time• At times he was struck by a fiercedesire to believe that the suspicion was nothing but a demon in his head.• At timeswholesections will be finished while others remainblank.• At a time when skills are in demand, they have been wantonly discarded.• I don't think that I can send you more than four or five canvasesat a time because of the cold.• They are evolvingat a time when more and more consumers are turning to the Internet for their shopping needs.• I long, at times, for clear-cutanswers.• In a way, she had come close to hating Nona at times, although she was not going to admit it.• The slow hours seemed to tick by one tick at a time in the night.