at one time和at a time的区别是什么

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。

at times,at a time,at one time,at the time的区别和用法
解答：at times:

有时；不时
[例句]
The tide is, at times, very high.

潮水有时涨得很高。

I like Bob but he's very annoying at times.

我喜欢鲍勃，但是他有时也很烦人。

The tide is at times very high.

潮水有时涨得很高。

She calls on me at times.

她有时来看我。
at a time
作“一次，每次”讲，常用于“数词+at a time”的结构中。例如：

Enter two at a time.
每次进来两人。

He checked them off one at a time as they came in.
他们进来时，他一个一个地核对。

注意它与at one time 的区别。at one time一般指“过去某一时期，曾一度(once)”或“同时”的意思。如表示“同时”，则两者可通用。例如：

At one time I used to like her, but not any more.
我曾一度很喜欢他，现在可不喜欢了。

at the time:
(1) 那时 then
[例句]
In 1969 the first men landed on the moon--I was twelve at the time.

一九六九年人类第一次登上月球——那时我十二岁。

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.

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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