电磁感应定律两种表述的讨论

Discussion on the Two Expression Forms of the Law of Electromagnetic Induction

电磁感应定律的两种表述，形式简单，意义明确，并且可以互导。但由于它们的推导是有条件、有侧重的，所以把握这些条件与特征，对于清晰理解它们各自的适用范围帮助很大。

The two expressions of the electromagnetic induction law are simple in form, clear in meaning, and can be inferred from each other. An appropriate understanding of the different inference conditions and their features is of great importance for the proper ranges of their applications.