first law of thermodynamicsfə:stlɔ:ɔvˌθə:məudaiˈnæmiks 基本英英近义反义 热力学第一定律 Noun: the fundamental principle of physics that the total energy of an isolated system is constant despite internal changes近义词conservation of energy物能量守恒定律…law of conservation of energy物能量守恒定律…