对不了解英文

I know nothing about ...... 一无所知 ; 不知道的事 ; 不知道如：I know nothing about it. 关于那件事我什么都不知道。 I know nothing about art history. 我对艺术史一无所知。

你的意思是“模棱两可”或者“含糊”吧？模棱两可 1.in an equivocal way; on the line 2.double-edged; two-faced; equivocal; evasive; ambiguous 3.to cut both ways含糊 [Informal] ambiguous; vague; uncertain; indefinite

I don't know. orI'm not clear.orI have no idea about it

I know little about this.

i'm not sure

I am not familiar with this.