体电阻率：表示直接通过材料的泄漏电流。
Volume resistivity: leakage of current directly through the material.
体电阻率和表面电阻率的测量决定于几个因素。
Volume and surface resistivity measurements are dependent on several factors.
玻璃和陶瓷也具有很高的体电阻率，但是在高湿度下表面电阻率性质较差，并且其压电性常常也较差。
Glass and ceramics also have high volume resistivity, but poor surface properties at high humidity and often-poor piezoelectric properties.
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