It is the electric charge density.

这是电荷密度。

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。

The mean charge depth and the charge density can be calculated.

电荷重心和电荷密度可通过计算得出。

The mobility becomes compromised with increased charge density.

迁移率随电荷密度的增加而趋于下降。

Surface charge density of apoptotic cell was reduced by electret.

负极性驻极体能减少凋亡细胞的表面电荷量。