根据火山灰颗粒的平均大小和形状，他认为任何先前发生的充电行为在数次过后基于消亡。
Based on the average size and shape of particles in the ash, "any initial charging that occurred would have decayed away many times over."
射线衍射和透射电子显微镜实验不但证实它的非晶性，而且给出它的平均颗粒度大小和晶化产物。
X-ray diffraction and transmission electron microscope experiments indicate the powder sample is amorphous and also show the average particle size and crystallization products.
最后分析了土颗粒半径差异、土体平均粒径大小对非饱和土强度的影响。
At last, the effect of soil gradation on the shear strength of unsaturated soils is analyzed qualitatively.
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