at once/all at once 是什么意思？at once/all at once 的含义 - 柯林高阶英语学习词典 - 在线工具

at once/all at once

phrase

If a number of different things happen at once or all at once, they all happen at the same time.

You can't be doing two things at once.

No bank could ever pay off its creditors if they all demanded their money at once.

She seems at once feminine and able to cope in a man's world.

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