The boy’s misconduct cost his mother many sleepless nights.

这男孩的不轨行为,使的母亲许多夜不得。

His bad behaviour has tarnished the good name of the school.

行为不轨, 败坏了学校的声誉。

Don't harbor unkind thoughts.

不要心不轨。

Their talk was slightly malicious.

们的谈话有点儿心不轨。