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.

贝蒂大男子主义怎么回事。

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

在纺工厂工作的人大多理解什麽。