fool's errand片語KK [fulz ˋɛrənd] /fulz ˈɛɹənd/發音片語1徒勞之舉、白費工夫、無用的差事Arguing with him about politics is a fool's errand.跟他爭論政治完全是徒勞之舉。2白跑一趟They sent me on a fool's errand to a store that had closed.他們讓我白跑一趟,那家店早就關門了。