constant volume短语¹⁴⁴⁹⁷²⁺² 基本例句 等容 We have discovered that this partial derivative that appears in the definition, the abstract definition of the differential for internal energy, is just equal to the constant volume heat capacity. 我们还发现,这个偏微分出现在了，内能的偏微分,定义式中，它也就是热容。163