对电势零点的选取问题进行了分析，重点论述了电势零点如何选取及所限定的条件。

The problem of choice of zero point of electric potential is analyzed. concentrating on how to choose and the limited conditions.

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通过静电学、低频交流、直流等电路实例，质疑了电势零点问题，并对此进行了澄清。

Through electrostatics and examples of low-frequency alternating current and direct-current circuit, the problem of zero potential point is queried and clarified.

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最后讨论零点不同的电势如何进行叠加。

Eventually, it debates how to superpose the electric potential when the zero point is different.

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