音标发音英式音标 [ˌplæŋks ˈkɒn.stənt]美式音标 [ˌplæŋks ˈkɑːn.stənt]英式发音 美式发音 基本解释普朗尅常數。同根派生 Planck's constant相关词英英字典劍橋英英字典 a number that never changes and that expresses the relationship between the energy of a photon and its frequencyPlanck's constant剑桥字典Planck's constant柯林斯字典