sexual behaviour that is considered strange and unpleasant by most people

The novels of the Marquis de Sade deal with sexual perversion. 萨德侯爵所著的那些小说描写的是性变态的内容。

the changing of something so that it is not what it was or should be

His testimony was clearly a perversion of the truth. 他的证词显然是对事实的歪曲。