His mother said he was mentally unstable because of drug addiction.

他的母亲则说，他是因染上毒瘾导致精神状况不稳定。

youdao

I guess it's because she's mentally unstable and those people tend to desire weird things.

我猜想那是因为她的精神不稳定，这些人往往希望怪异的东西。

youdao

In past years, disgruntled or mentally unstable Chinese citizens have set off explosions near buildings or on buses.

在过去这几年，不满或有心理问题的不安定中国公民在建筑楼或公交车上引发爆炸。

youdao

Bryant's attorneys contend the woman is mentally unstable and fabricated the charge against him.

CNN: Judge deals blow to Bryant defense

Police are seeking a motive but say they believe the attacker could be mentally unstable.

CNN: STORY HIGHLIGHTS

Despite the controversy that his schoolwork created, classmates did not view Hasan as mentally unstable or psychotic, the source said.

CNN: STORY HIGHLIGHTS