The color is the important physical property of the material, the factors. Such as structure, smooth degree of surface, sizeofparticle and temperature, etc. have something to do with it.
颜色是物质的重要物理性质,它与物质的结构、表面光滑度、颗粒大小及温度等因素有关。
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The problems of milling process are discussed. A series experiment research demonstrated the system has advantage of which the sizeofparticle is small, the ratio of milling is large, the …
And all it does is say that we're going to divide up our available volume into little bits that are basically the sizeof an atom or a molecule, or whatever the particle is in the gas phase.