要想了解电是怎么回事，得先了解原子及构成原子的亚原子粒子。

The understanding of electricity depends on a knowledge of atoms and the subatomic particles of which they are composed.

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任何物质都是由原子构成的。无论是固体、液体还是气体。

Any substance is made of atom. Whether it is solid, liquid or gas.

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水分子由两个氢原子和一个氧原子构成。

A molecule of water consists of two atoms of hydrogen and one atom of oxygen.

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So, we see is when we use the octet rule to look at fluorine molecule, we're combining two fluorine atoms, and what we end up with is an f f molecule where they're sharing two electrons, so making that covalent bond.

那么，我们看到把八隅体规则用到氟分子上,就是把两个氟原子组合起来，最终得到的氟分子中两个原子,共用一对电子，这就构成了共价键。

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these pentose molecules, whether it's ribose or deoxyribose, the carbons are numbered the same 1', 2', 3', 4', 5', those are the five carbons that make up the pentose.

这些戊糖分子,不管是核糖还是脱氧核糖,碳都是从1'标注到5',也就是构成戊糖的5个碳原子

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So there's some--and will eventually get used to make something else.

其中的某些原子,将被用来构成其他的东西

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