魚龍混雜
[詞典] dragons and fishes jumbled together; good and bad mixed together; good and bad people mixed up; The bad became mixed with the good.;
[例句]在革命高潮時期，各種人都來參加，未免泥沙俱下，魚龍混雜。
During the high tide of the revolution, all kinds of people flocked to join; so inevitably the waters were muddied and the bad became mixed with the good.