"What happens when you digitize these books and make them accessible on the net is that they get a lot more use,"
VOA: standard.2009.12.31
So, when we get really close together, granted, there is a net positive negative charge with a Coulombic force of attraction.
当它们真正离得很近时,假设有一个带正负电的电荷,带有库仑引力。
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