Charge and current, and magnetic flux and voltage, are connected through their definitions.

电荷和电流，磁通量和电压，根据它们的解释关联在一起。

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Where was the device that connected charge and magnetic flux?

连接电荷和磁通量的元件在哪里？

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The conservation principles of charge and of flux linkages are proved mathematically, and their physical meanings are given in the paper.

本文对电荷守恒定律和磁链守恒定律从数学方面作了较深入的论证，并给出了其物理意义。

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