Because these things are unpaired, we have already seen how unpaired electrons play a role in the Stern-Gerlach experiment.

因为这些事物都是未成对的，我们已经发现在 Stern-Gerlach 实验中，未成对电子扮演怎样一个角色了。

youdao

Three unpaired electrons in nitrogen.

有三个未成键电子在氮原子中。

youdao

So now what we have is four unpaired electrons.

现在我们有4个未配对电子。

youdao

So, electron promotion does not happen in terms of nitrogen, because it would not increased our number of unpaired electrons.

这里对于氮原子不会有电子激发，因为这不会增加,未配对电子的数目。

麻省理工公开课 - 化学原理课程节选

Orbitals of equivalent energy, we strive for unpaired electrons.

相同能量轨道，我们找到不成对电子。

麻省理工公开课 - 固态化学导论课程节选

And again, we have the pairing of the unpaired electrons, and we have two orbitals coming together.

同样，我们有未配对电子的配对，我们有两个轨道结合。

麻省理工公开课 - 化学原理课程节选

The paired and unpaired rats in the two boxes were subsequently exposed to five tones used in the fear-conditioning phase of the experiment.

WSJ: Why Children Have More Control of Their Dreams

Compared with the unpaired group, the paired group showed significantly increased fear responses in the box that didn't have the other rat's scent.

WSJ: Why Children Have More Control of Their Dreams

After 24 hours, the so-called paired and unpaired rats were placed in two boxes, one of which had been previously occupied for three hours by another rat of the same species that imparted its scent.

WSJ: Why Children Have More Control of Their Dreams