The apparent arrow of time emerges as a property of the macroscopic system, but it's not there in the laws that govern the individual particle interactions.
很显然时间箭头成为了宏观系统的一种性质，但没有定律来控制单个原子间的相互作用。
The nonequilibrium statistical operator (NSO) of the system is constructed and a series of macroscopic equations for its particle number, momentum, energy, force aad entropy etc. are derived.
构成了此体系的非平衡统计算符，进而导出其粒子数、动量、能量、力和熵等一系列宏观方程。
After reflection, the average particle velocity near free surface is equal to twice the piston velocity approximately, which agrees with macroscopic phenomena.
激波在自由面反射后，自由表面附近的粒子速度为活塞速度的二倍，这和宏观力学结果相同。
Meanwhile, this article has proved that the classical wave theory is correct in the macroscopic physical realm and the particle-model of light is available in the microscopic physical realm.
同时进一步论证了在宏观物理领域经典波动理论是正确的；光的粒子模型主要适用微观物理领域。
Meanwhile, this article has proved that the classical wave theory is correct in the macroscopic physical realm and the particle-model of light is available in the microscopic physical realm.
同时进一步论证了在宏观物理领域经典波动理论是正确的；光的粒子模型主要适用微观物理领域。
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