"rotten apple" in Chinese (Simplified)
坏苹果害群之马 (比喻)
Definition
“坏苹果”指对群体有不良影响的人，也可以指变质的苹果。
Usage Notes (Chinese (Simplified))
该短语常用来比喻人，指一个人能对整个群体产生负面影响。多用于正式和非正式场合。需结合语境，勿与字面上“烂苹果”混淆。
Examples
One rotten apple can spoil the whole barrel.
一个**坏苹果**能毁掉整桶苹果。
There was a rotten apple in the group that caused trouble.
小组里有个**害群之马**，总是惹麻烦。
He is the rotten apple in our class.
他是我们班的**害群之马**。
Most of the employees are great, but every company has a rotten apple.
大部分员工都很好，但每家公司都有个**害群之马**。
Don’t let one rotten apple ruin it for everyone.
不要让一个**坏苹果**害了大家。
It’s sad that a rotten apple makes people think badly of the whole group.
令人难过的是，一个**害群之马**让人对整个团队有了坏印象。