We often look for skeletons in the closets of politicians.

我们经常在政客的衣橱里寻找骷髅。

This expression " a skeleton in the closet" refers to a family secret that is embarrassing or perhaps one that is shameful, that you don't want other people to find out about.

“a skeleton in the closet” 这个表达是指一个令人尴尬的家庭秘密， 或者是一个你不想让别人知道的可耻的秘密。