sixfold/ˈsɪks.foʊld/副词(以)六倍(地)Wireless use has increased sixfold since 1993.自1993年以后,无线上网使用量增加了六倍。/ˈsɪks.foʊld/形容词六倍的a sixfold rise in profit利润增长六倍想跟读,去练习