音标发音英式音标 [ˈrɒk ˌsaɪ.kəl]美式音标 [ˈrɑːk ˌsaɪ.kəl]英式发音 美式发音 基本解释岩石循环，岩石周期。同根派生 英英字典剑桥英英字典 the way that rock is broken down into pieces by erosion, then carried by wind and water until pressed together to form rock again