neither here nor there 不相干；无关紧要

【例句】
Whether or not he realised the fact was neither here nor there.
他是否认识到事实真相无关紧要。

I know many people like the idea, but that's neither here nor there: we just can't afford it.
我知道许多人喜欢这个主意，可是这并不相干；我们办不到。