fifty-eight num.五十八fifty-dollar bill fifty-cent piece fifty years of age [经济学]半白fifty two fifty three fifty six fifty seven fifty one fifty nine fifty four fifty fold 五十倍fifty five fifty fifty fifty eight fifty degrees below fifty (adj., n.) fifty n. 五十；五十个；编号为50的东西 adj. 五十的；五十个的；众多的fiftieth (adj., n.) fiftieth num.第五十n.第五十(个)adj.第五十的adv.第五十