If you refer to something as a triviality, you think that it is unimportant and not serious.
例句
He accused me of making a great fuss about trivialities...他指責我為丁點瑣事大驚小怪。Interviews with politicians were juxtaposed with news items of quite astonishing triviality.對政治家的訪談與內容相當聳動的八卦新聞放在同一個版面。