un·pre·ce·dent·ed /ʌnˈpresɪdentɪd/ ●○○ AWL adjectiveadj FIRSTUNUSUALnever having happened before, or never having happened so much 空前的,前所未有的 He took the unprecedented step of stating that the rumours were false. 他史无前例地声明那些谣言实属子虚乌有。
Crime has increased on an unprecedented scale. 犯罪率增幅之大前所未有。
unprecedented in an event that is unprecedented in recent history 近代历史上没有先例的事件
► see thesaurus at unusual —unprecedentedly adverbadv