性情乖戾的 på engelska:

My children are disobedient.

My dog is very disobedient.

To be disobedient, a child has to break a rule.

He never does what he's told. He's very disobedient

Children are inclined to be disobedient.

From an adult's one-sided point of view, children's attitudes often seem to be disobedient.