Electrostatic field is a very important chapter in electromagnetics and the strength of electric field is one of the two basic physical quantities describing the property of electrostatic field.
静电场是电磁学中非常重要的一章，而电场强度是描述静电场性质的两个基本物理量之一。
The article proceeds from the characteristic of doing work of electrostatic field strength and proves that electrostatic field is a conservative force field.
文章从静电场力作功的特点出发，说明静电场是保守力场。
The article proceeds from the characteristic of doing work of electrostatic field strength and proves that electrostatic field is a conservative force field.
文章从静电场力作功的特点出发，说明静电场是保守力场。
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