发脾气

yǒu lǐ màn màn shuō hé bì fā pí qi

有理慢慢说，何必发脾气。

Speak calmly if you think you're in the right, there's no need to get angry.

bù yào wèi zhè diǎn xiǎo shì fā pí qi

不要为这点小事发脾气。

Don't lose your temper over such a trifle.

tā yào shi shuì mián bù zú jiù huì fā pí qi

他要是睡眠不足就会发脾气。

He gets ratty if he doesn 't get enough sleep.

tā chéng rèn zì jǐ lèi le jiù huì fā pí qi

他承认自己累了就会发脾气。

He acknowledges that when he's tired he gets bad-tempered.