英 [ʌnˈpeəd] 美 [ʌnˈperd]
adj. 不成双的；无对手的；无配偶的
不成对的
非成对的;不成双的
... 不成双的 unpaired 不成器 neer-do-well, good-for-nothing 不成形地 shapelessly ...
支持成对(Paired)和不成对(Unpaired)的频谱分配
(Paired)和非成对(Unpaired)频谱; ④频谱效率: 下行链路 达到5(bit/s)/Hz(3～4 倍于R6HSDPA)，上行链路达到2.5
3．LDA简单地认为计算体系是顺磁性（Paramagnetic）的，对于包含未配对 （Unpaired）自旋体系，需采用局域自旋密度近似（LSDA）（对自旋向上（spinup） 和向下（spindown）的电子分别采用密度泛函计算）是很有用的，...
不成双的；无对手的；无配偶的
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。
Three unpaired electrons in nitrogen.
有三个未成键电子在氮原子中。
So now what we have is four unpaired electrons.
现在我们有4个未配对电子。
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。
化学原理课程节选 : 麻省理工公开课
Orbitals of equivalent energy, we strive for unpaired electrons.
相同能量轨道，我们找到不成对电子。
固态化学导论课程节选 : 麻省理工公开课
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。
化学原理课程节选 : 麻省理工公开课
The paired and unpaired rats in the two boxes were subsequently exposed to five tones used in the fear-conditioning phase of the experiment.
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.
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.