良莠不齊（良莠不齊）　

◎ 良莠不齊 liángyǒu-bùqí

[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] 莠:狗尾草,比喻品質(zhì)壞的人。比喻好人壞人混在一起

無如眾生愚賢不等,也就如五谷良莠不齊。——清· 文康《兒女英雄傳》