音标发音英式音标 [ˌpriːˈɒp.ər.ə.tɪv]美式音标 [ˌpriːˈɑːp.ɚ.ə.t̬ɪv]英式发音 美式发音 基本解释手术前的。同根派生 preoperative相关词英英字典剑桥英英字典 relating to the period of time immediately before a medical operationpreoperative剑桥字典preoperative柯林斯字典