at one time \x0d\x0a\x0d\x0a曾经，一度；同时; (过去或从前)有个时期，曾经(有一段时间)，一度\x0d\x0aThey had based on Greenland at one time. \x0d\x0a他们一度曾在格林兰岛上建立基地。\x0d\x0aat a time \x0d\x0a一次；每次；在某时\x0d\x0aemale sheep produce one or two lambs at a time. \x0d\x0a母羊一次生一至两头羊羔。
A.at a time 依次,逐一,每次.如;1.Don't try to do everything at once,take it a bit at a time.不要什么事情都一块干,要一次做一点.2.Take the pills two at a time.每次服2粒.
B.at one time一度,从前.如:At one time I used to go skiing every winter.我有一度每到冬天就去滑雪.
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