To hurt own self to lose temper and be crazy.

自己害自己,莫过于乱发脾气.

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When he's very tired from the hard work, it is easy for him to lose temper.

艰苦的工作使他十分疲劳, 他很容易就会发脾气.

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You must be able to tell yourself: " I can't lose temper now! "

这时候你就要告诉自己: [ 我现在不能够发脾气!

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