beyond a doubt片語KK [bɪˋɑnd ə daʊt] /bɪˈɑnd ə daʊt/發音片語1毫無疑問、無疑、確實She is beyond a doubt the best pianist in the school.她毫無疑問是全校最出色的鋼琴手。2無可置疑、確鑿多與 prove、establish 連用The evidence proved his innocence beyond a doubt.這些證據確鑿地證明了他的清白。