It is the electric charge density.
这是电荷密度。
But now, if I integrate the charge density over the entire region, then what I will get is actually the total amount of electric charge inside the region.
如果将电荷密度对整个区域做积分，将得到，在区域内的电量总和。
Experiments showed that modified PAM is a kind of amphoteric PAM with low molecular weight and higher density of electric charge.
研究发现，实验所制得的改性聚丙烯酰胺是一种低分子量、较高电荷密度的两性聚丙烯酰胺。
Transverse flux machine (TFM) is a novel machine with the merits of large force density, decoupling of electric charge and magnetic charge, easy to design and so on.
横向磁场电机(TFM)是一种新型电机，具有输出力密度大、电磁负荷解耦、设计灵活等特点。
Experiment results show that the application of an electric field causes nonuniform distribution of the density of the defects in the space charge region.
实验结果表明，辐照电场的存在将造成缺陷在空间电荷区的不均匀分布。
The model, which describes the charge carrier's density and the electric field evolution near the interface features a theoretical analysis consistent with the existing and experimental results.
基于以上模型，给出了界面附近的载流子和电场的动态演化过程，理论分析与已有的实验结果非常吻合。
The model, which describes the charge carrier's density and the electric field evolution near the interface features a theoretical analysis consistent with the existing and experimental results.
基于以上模型，给出了界面附近的载流子和电场的动态演化过程，理论分析与已有的实验结果非常吻合。
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