When you can catch your mind wondering, pay attention to the thought.

当你能发现你的思维正在怀疑的时候，请注意这种想法。

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Mind that your children don't catch the flu.

小心别让你孩子传上流感。

《新英汉大辞典》

You can only go without adequate sleep for so long before your body and mind force you to catch up.

在你的身体和头脑强迫你入睡前，你失眠的时间也不会太长。

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