在广义协变的伦敦方程基础上讨论了超导体的电动力学特性，并由此建立起超导体的电磁波动方程。

Based on the generalized London theory, this paper discusses the electrodynamics of superconductor, and further establishes the corresponding electromagnetic wave equation.

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在经典电动力学的框架内，普遍自由选择涉及电磁势规范变换的任意规范条件。

Within the framework of classical electrodynamics (CED) it is common practice to choose freely an arbitrary gauge condition with respect to a gauge transformation of the electromagnetic potentials.

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