中英成語俚語800對184：害群之馬

　　害群之馬

　　One scabbed (sickly) sheep infects a whole flock.

　　The rotten apple injures its neighbour.

　　Bad egg of the community.

　　eg：That naughty boy is the black sheep of the family.

　　中英俚語俗語來源：莊子：“夫為天下者，亦莫以異乎牧馬者哉?亦去其害馬者而已矣。”