There's always a bad apple in every bunch.

到哪儿都有害群之马。

youdao

There is always a bad apple in every bunch.

在那儿都有害群之马。

youdao

Better don't talk to George. He is a bad apple.

最好别理乔治。他是个坏蛋。

youdao

BigSmart says Lamont is just a bad apple--the same line it used with Fournier in Maine.

FORBES: Con.com

Apple without Steve Jobs in the past has been just a bad apple core.

FORBES: Why Steve Jobs Wouldn't Care About Being Called Stingy or Having Gender Bias

The usual means of screening are often weak when it comes to determining if a job candidate is a bad apple.

WSJ: A Few Troublesome Employees Can Outweigh the Good