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。

麻省理工公开课 - 固态化学导论课程节选

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。

麻省理工公开课 - 固态化学导论课程节选

Different kinds of polarity form, there's a head, and there's a tail, there's a back, there's a front, there's a left side and there's a right side.

不同的极性开始形成,有头端,也有尾端,有后面,也有前面,有左侧,也有右侧

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2 3 So, that means we've got one, two, three, four nonpolar bonds in here.

我们有，4个非极性的键。

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The sperm - say this is the one sperm cell that's able to inject its DNA into the egg, well then this cell has a polarity.

假设某个精子细胞,成功向卵子注入了自己的DNA,那这个细胞就有了极性

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And he coined the term "polar covalency."

他创造出还提出了一个属于有极性共价键“

麻省理工公开课 - 固态化学导论课程节选