利用特殊函数求解电势、电场，计算了点电荷与磁偶极子相互作用的电磁角动量。
The electric potential and the field of point charge are resolved with a special function.
电势可比作每单位电荷的位能。
Electric potential can be thought of as potential energy per unit charge.
电势可比作每单位电荷的位能。
Electric potential can be thought of as potential energy per unit charge.
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