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The action of the negative pole of a magnetic needle is just as real as the action of the positive pole.
一根磁针的磁极作用，无论正负都是一样的真实。
youdao
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The negative pole of a battery is the part which releases electrons.
电池的负极是释放电子的一端。
youdao
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The negative pole of a battery is the part which releases electrons.
电池的负极是释放电子的一端。
youdao