By the charge density we mean the per unit volume.
所谓的电荷密度是指单位体积的电荷。
It is the amount of electric charge per unit volume.
是电荷与体积的比值。
In physics it is an identification of material by noting its mass per unit volume.
在物理学上，是以每单位体积的质量来鉴别物质。
Mass per unit of volume in powder form, including the air trapped between the particles.
每单位体积粉末的质量，包括粒子之间的空气。
Mass per unit of volume in powder form, including the air trapped between the particles.
每单位体积粉末的质量，包括粒子之间的空气。
应用推荐