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at a time 和at the same time的区别

分类: 作业答案 • 2022-01-02 13:58:25

问题描述：

答

at the same time表示在同一时刻或时间
at a time:一次；每次；在某时（强调具体的某一次)

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at a time 和at the same time的区别

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