音标发音英式音标 [ˈprep ˌtaɪm]美式音标 [ˈprep ˌtaɪm]英式发音 美式发音 基本解释（教师的）备课时间。同根派生 英英字典剑桥英英字典 a period when teachers are at school but do not teach, and are therefore able to prepare for later classes