Whenpeopleloselegsafteraccidentsorillnesses,emergencyca...
問題詳情:Whenpeopleloselegsafteraccidentsorillnesses,emergencycareandartificiallimbs(假肢)oftenallowthemtowalkagain.Newts(蠑螈)inthesamesituation,ontheotherhand,cangrowlimbsbackontheirown!Scientistshavekno...