In nature, for example, the several celestial bodies, which form our solar system, compose a kineticsystem, and thereby show that they are related to one another.
例如，在自然界，形成我们太阳系的不同的星球彼此处于运动的关系中，由于运动而显示出它们之间有联系。
2
The specific distribution function of a relativistic kineticsystem is given and its Lorentz scalar property is proved. A relativistic generalized Liouville equation is established.
Energy can change or cannot change, can increase or decrease or remain the same kinetic energy, but if there are no external forces on the system, momentum is always conserved.