There is a skeleton in the cupboard.

家家有本难念的经。

Everyone has a skeleton in the cupboard.

家家有一本难念的经.

Every family has a skeleton in the cupboard.

家家都有难言之隐.

Learn to have mercy on the ones who hurt you, because they are poor person too. Every family has a skeleton in the cupboard.

学会宽容伤害我自己的人，因为他们很可怜，各人都有我自己的难处。