Each of us has within us a life force a spirit a principle and essence an unfulfilled potential that gives no rest no peace until it is realized.
我们每个人内心都有一种不达目的不罢休的生命力、精神、原则和潜力。
According to the principle of virtual-work, the formula of electromagnetic force based on magnetic vector potential is deduced.
根据虚位移原理，推导出基于矢量磁势的电磁力计算公式。
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