have no idea

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

我清楚我犯了什么错误。

Betty had no idea what male chauvinism was.

贝蒂知道大男子主义是怎么。

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

在纺厂人大多理解什麽是落纱。