音标发音英式音标 [ˌefˈem]美式音标 [ˌefˈem]英式发音 美式发音 基本解释调频。同根派生 FM相关词英英字典剑桥英英字典 abbreviation for frequency modulation: a radio system for broadcasting that produces a very clear soundFM剑桥字典FM柯林斯字典