音标发音英式音标 [ˌtwelv.təʊn ˈskeɪl]美式音标 [ˌtwelv.toʊn ˈskeɪl]英式发音 美式发音 基本解释十二声音阶。同根派生 英英字典剑桥英英字典 a musical scale including all twelve half steps (= smallest differences in sound) in an octave (= series of eight notes)