一窍不通,意思是指没一窍是贯通的,比喻一点儿也不懂(be utterly1 ignorant of)。可以翻译为its all Greek to somebody,all Greek to me是英文惯用语,比喻something is not understandable。

例句:

你弄懂这类说明了吗?我根本一窍不通!

Can you make sense of these instructions? Its all Greek to me!

对不起,我不了解你说的是什么,我对那一窍不通。

Sorry, I dont understand what you said. It is Greek to me.