have no idea

Betty had no idea what male chauvinism was.

贝蒂知道大男子主义是怎么回事。

I have no idea who this murderous fiend may be.

我知道这个杀人恶魔是谁。

I had no idea of the gaffe which I was committing.

我楚我犯了什么。

People who don't work in a spinnery mostly have no idea about doffing.

在纺织工厂工作人大多理解什麽是落纱。