随着万有引力的挤压，中子星几乎完全由中子组成，不包含带有电荷的亚粒子。

Compressed tightly by gravity, they are composed almost entirely of neutrons, sub-atomic particles with no electric charge that form part of atoms.

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当这两个均带有电荷的原子核相距遥远时，将它们推近，会使它们彼此相斥。

These two nuclei, when they're far apart, are charged. And you push them together and they repel.

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在1911年之前，科学家认为电子带有电荷以及质量，但没有人很确认原子是怎样组成的。

By 1911, scientists had already measured the charge and mass of an electron. But no one was sure how the atom was structured.

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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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And in this case, the tie-breaker goes to the molecule in which the negative charge is on the most electronegative atom.

而在这种情况下，我们需要进行“附加赛“,也就是看看分子中带有负的,形式电荷的原子是不是电负性最高的。

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It turns out that getting large molecules like this, particularly large charged molecules like nucleic acids, inside of cells is not so easy.

后来证实,将这样的大分子物质,尤其是像核酸这样带有大量电荷的分子,送入细胞不是一件容易的事

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