一窍不通

They have little acquaintance with colloquial English.

他们英语会话几乎窍不。

I’m afraid geophysics is rather a closed book to me.

地球物理学窍不。

Don’t ask him to organize things! He doesn’t know his arse from his elbow!

千万别让他来组织，他窍不。

It's a sealed book to me.

这窍不。