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

这男孩的为,使他的母亲许多夜得安眠。

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

他为, 败坏了学校的声誉。

Don't harbor unkind thoughts.

要心。

Their talk was slightly malicious.

他们的谈话有点儿心。