The terrible secret is called 'a skeleton in the cupboard'.

惊人的秘密称作“柜中骷髅”。

It was a skeleton in the cupboard, he thought.

他认为这是桩家丑。

It seems that this super idol has a skeleton in the cupboard.

看来这个超级偶像在橱柜里有一个骷髅。

The only person I know who has a skeleton in the cupboard is George Carlton, and he is very proud of the fact.

我所认识的唯一的在柜中藏骷嵝的人便是乔治。卡尔顿，他甚至引以为自豪。