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他入射的阿尔法粒子带有两个正电荷。
He shot alpha particles which have a charge of plus two.
youdao
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两个负电荷相斥，每个正电荷也是如此。
Two negative charges repel each other, and so do two positive charges.
youdao
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两个负电荷相斥，每个正电荷也是如此。
Two negative charges repel each other, and so do two positive charges.
youdao