她的心脏有毛病。

Tāde xīnzàng yǒu máobìng.

There’s something wrong with her heart.

脾气坏是他的老毛病。

Píqi huài shì tāde lǎo máobìng.

His bad temper is an old habit of his.

他的电脑总是有些毛病。

Tā de diànnǎo zǒng shì yǒuxiē máobìng.

His computer always has some problems.