假设你让橡胶棒带电然后让它接触一个不带电的物体。

Suppose you charge a rubber rod and then touch it to a neutral object.

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科学家证明一个完整的原子不带电荷。

Scientists have proved that a complete atom has no electrical charge.

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科学家证明一个完整的原子不带电荷。

Scientists have proved that a complete atom has no electrical charge.

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