bad apple

基本解释

"He truly was the bad apple that spoiled the barrel, " Felps said.
Felps：“他的确是毁了一桶好苹果的那颗坏苹果。”
One "bad apple" can spread negative behaviour like a virus to bring down officemates or destroy a good team, according to a new study examining conflict in the workplace.
一项针对办公室矛盾的调查显示，某个人的坏行为能像病毒一样传播感染，最终带坏同事或者破坏一个好团队。
If a bad apple slips through screening(3) in the hiring process, he or she should be placed to work alone as much as possible, the study's lead author, William Felps, said.
本研究主要作者William Felps说如果一颗坏苹果溜进公司招聘榜，他或者她应该尽量被安排独立工作。

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 Osmonds recorded Jackson's "One Bad Apple" in 1970, taking it to No. 1.
NPR: Rock And Soul Songwriter George Jackson Dies At 68