It's a beautiful theory to assume, to see what would happen if they did.

但是这是个非常理想的假设，用于判断如果他们这样做了会发生什么事。

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that you know it's not going to happen or you know it's not useful to do.

你知道这事没发生的可能，或者这么做并不会起到什么作用。

The thing is 课堂 - SpeakingMax英语口语达人

What happened?

那样会发生什么事呢？

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