本文从能量均分定理入手深入探讨了关于温度的定义问题,并指出温度是分子平均动能的标志只适用于理想气体,对于温度不是很低的非理想气体、液体和固体,温度只与分子的平均平动动能有关。其次还指出,对于光子、电子以及核自旋等非经典粒子或系统,温度都有其各自不同的特点和遵循着各自不同的规律。 In this paper, the definition of temperature is discussed in depth from the energy average division theorem. It is pointed out that temperature is the sign of average molecular kinetic energy only for ideal gas. For non-ideal gas, liquid and solid at low temperature, The average translational energy related. Secondly, it also points out that for the non-classical particles or systems such as photons, electrons and nuclear spins, the temperature has its own different characteristics and follows different laws.