讲解文本：

play favorites 偏心，偏爱

Teachers are not supposed to play favorites. That's unfair to other students.

老师不应该有偏心，这样对其他学生不公平。

It's ok to have a good friend in the office, but don't play favorites.

在办公室有一个朋友是好事，但也不要太偏心了。

疯狂练习吧!