他常常轻易就发脾气 He often easily throw tantrums
他就发脾气
He lost his temper.
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他要是睡眠不足动不动就发脾气。
He gets ratty if he doesn't get enough sleep.
《牛津词典》
可是最近他一离开我就发脾气。
But lately I've noticed that he's becoming angry about being separated from me for a few days.
youdao
如果没有找到，他就大发脾气。
If he can't find them, he has a tantrum.
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