良莠不齐

⒈  莠：狗尾草，比喻品质坏的人。比喻好人坏人混在一起。

例无如众生愚贤不等，也就如五谷良莠不齐。——清·文康《儿女英雄传》

英grain or chaff; the good and the bad are intermingled; sheep and goats; there are bad as well as good people in the group; there are weeds among seedlings; thread and thrum;