frivolous

adj.愚蠢的; 可笑的; 无聊的; 不严肃的 牛津词典 adj. 愚蠢的；可笑的silly or amusing, especially when such behaviour is not suitable frivolous comments/suggestions 愚蠢的话；可笑的建议 Sorry, I was being frivolous.对不起，我失态了。 无聊的...