行为不良

His bad behaviour resulted in his expulsion from school.

他不良行导致他被学校开除了。

Mary denounced her husband for bad behavior.

玛丽谴责丈夫不良行。

That confounded boy's bad behaviour annoys me.

那个男孩不良行使烦恼。

One bad deed can blemish a good reputation.

一次不良行害好名声。