The second way to have something that is net nonpolar is to have spatially symmetric disposition of polar bonds.

第二种构成,需要空间非极性,就是需要极性键的空间对称分布。

麻省理工公开课 - 固态化学导论课程节选

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。

麻省理工公开课 - 固态化学导论课程节选

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。

麻省理工公开课 - 固态化学导论课程节选

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。

麻省理工公开课 - 固态化学导论课程节选

We somehow have to take hydrogen, attach it to carbon, and we have to make it symmetric, and we have to make it nonpolar.

我们需要把H接到C周围，而且我们需要让它是对称，且非极性的。

麻省理工公开课 - 固态化学导论课程节选

And yet, the molecule is symmetric and nonpolar.

所以这个分子是对称非极性的。

麻省理工公开课 - 固态化学导论课程节选