For one particle, element and subsystem of the system, there is no order to say.
对于系统内的桌一粒子、要素、子系统来说是并无有序的概念可言。
The standard model brings together two theories of particle physics in order to describe the interactions of subatomic particles, except those due to gravity.
除那些之外由于重力，为了描述亚原子粒子的相互作用，标准模型集合粒子物理学的两个理论。
But the PM2.5 particle obeys Brown motion law is out of order, into the pore particles less than the calculation theory, the use of screens should be longer than the theoretical calculation time.
但PM 2.5微粒运动也遵循布朗运动规律，是杂乱无章的，进入微孔的颗粒比理论计算少，纱窗使用时间应比理论计算时间更长。
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