英语语法分析

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。

The electret microphone is a new microphone which is made with the electret material.

驻极体传声器是一种用驻极体材料制造的新型传声器。

In this paper, the formulas of hopping current in polymer and polymer electret are derived.

推导了聚合物和聚合物驻极体中的跳跃电流公式。