A nonpolar covalent bond happens when both atoms have the same strength of electric attraction for the Shared electrons.

两个原子对共用电子对具有相同的引力时，则形成非极性共价键。

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Remember, every time we have two electrons that are being Shared, that's a single bond.

还记得，每次我们有两个电子被共用，我们就有了一个单键。

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A pair of electrons Shared between two atoms in a covalent bond.

在共价键中被两个原子所共有的一对电子。

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So, shared electrons are the ones that are shared between the carbon and the nitrogen, so we have 6 shared electrons, and we want to take 1/2 of that.

共用电子是那些在碳和氮之间,被它们共用的电子，那么我们有六个共用电子，然后我们要给它乘上二分之一。

麻省理工公开课 - 化学原理课程节选

And then we end up having 6 shared electrons, 2 from each of the bonds, so we end up with a formal charge on sulfur of plus 1.

然后我们有六个共用电子，每个键两个，因此最终硫的形式电荷量为正一。

麻省理工公开课 - 化学原理课程节选

The electrons are not equally shared and the carbon hogs the electrons a little bit more than the hydrogen, so the carbon is electron-rich and the hydrogen is just a little bit electron-deficient.

电子不是平均共享的,碳原子比氢原子吸引电子,更强烈一点点，所以碳原子是富电子,而氢原子是缺电子。

麻省理工公开课 - 固态化学导论课程节选