hái / zi / men / dōu / zhī / dào / bù / néng / yīn / wèi / yì / diǎn / xiǎo / shì / jiù / fā / huài / pí / qì

孩子们都知道，不能因为一点小事就发坏脾气。

The children all know they should not lose their temper over something trivial.