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We can say that a nonpolar molecule you can have as a result of two different conditions.
所以你可以说非极性分子,有两种构成方式。
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Nonpolar molecules result from either, it's one or the other.
一个非极性分子，不是这一种就是那一种。
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Here is the question. Is methane a polar molecule or a nonpolar molecule? Let's look carefully.
问题是，甲烷是一个极性分子还是非极性分子,我们仔细看看。
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We only have the one bond so the actual HF molecule is polar, it has a net dipole.
但HF中只有一根键,所以分子也是极性的而甲烷中有一个网状偶极。
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Symmetric disposition of polar bonds still results in a nonpolar molecule.
空间对称的极性键分布,还是会导致整个分子为非极性分子。
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We know that it's non-polar.
我们都知道他是非极性分子。
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If we can do that, we'll end up with a symmetric nonpolar molecule.
如果我们能这样做，我们就能得到那些对称非极性的分子。
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And yet, the molecule is symmetric and nonpolar.
所以这个分子是对称非极性的。
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This is homonuclear and so these are nonpolar.
这是同核分子所以是非极性的。
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All of these multiatomic moieties are nonpolar.
这些分子由多原子组成，但都是非极性的。
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What makes something polar versus nonpolar?
是什么让一个分子呈极性或者非极性？
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This bond is polar, but again, as I alluded to earlier, because the carbon is centered in the tetrahedron, because of the sp3 hybridization, the molecule itself is symmetric and nonpolar.
这个键是非极性的，但是，我们断言过早，因为C是中心原子，由于sp3杂化，这个分子本身是非极性的且对称的。
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