通过质量加权平均，给出了石墨粉尘的体积、面积和直径分布函数。

By the mass-weighted average, the distribution function of volume, area and diameter for graphite particle were obtained.

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目的观察大鼠大脑白质、皮质内毛细血管总长度、总体积、总表面积和平均直径。

Objective to study the total length, total volume, total surface area and average diameter of the capillaries in rat white matter and cortex.

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对H 13钢退火碳化物颗粒的平均直径、弥散度与硬度的关系的研究表明，在碳化物体积分数一定时，硬度是碳化物颗粒平均直径的函数，颗粒直径越大，退火硬度越低。

The relationship among the diameter and dispersity of the carbide and the hardness of the annealed H13 steel shows that when the volume of the carbide is constant, hardness is the.

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