1. N-UNCOUNT If you talk about the irrelevance of something, you mean that it is irrelevant. 不相關(guān)

...the utter irrelevance of the debate. …與這一爭(zhēng)論完全毫不相關(guān)。

2. N-COUNT If you describe something as an irrelevance, you have a low opinion of it because it is not important in a situation. 無(wú)意義的事

The Patriotic Front has been a political irrelevance since it was abandoned by its foreign backers. “愛(ài)國(guó)陣線”自從被其外國(guó)支持者們遺棄之后就已經(jīng)沒(méi)有任何政治意義了。