What you've built is an engine. You cool, you heat, you heat, you cool, you get back to the same place, but you've just done work to the environment.

这就是热机，我们用燃料或者热源加热，然后把它，与大气接触让它冷却。

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I would just get all my work done, like the weekend before it was due.

我会在周末之前把所有的工作都做完。

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but you do want the work to get done.

但你希望这项工作能够完成。

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