brain drain造句

That maths exam I took was a regular brain drain.
绞尽脑汁的数学测验,我真是绞尽了脑汁.

There is a major brain drain from China to other countries.
中国的很多人才外流到国外.

This company experienced a serious brain - drain in the competition.
在竞争中,这家公司人才流失严重.