未共用电子对

未共（享）电子对; 非共享电子对

lone pairs───未共用电子对

long hair───长发

base pair───[生化]碱基对

lone hand───孤军奋战

long pig───人肉

long tail───长尾

longhair───n.（嬉皮士之类）留长发者；演奏古典音乐的人；（不切实际的）文人；长毛猫；adj.知识分子的

to pair───配对

Cooper pair───库珀对

That's what we call when we have three bonding atoms and one lone pair.───这是当我们有3个成键电子，和一个孤对时这样称它。

So, which atom is in need of those lone pair electrons?───那么，哪个原子需要这对孤对电子呢？

So how many lone pair electrons do we have?───那么我们有多少孤对电子呢？

The lone-pair interactions change the chemical characteristics of the carbon.───这些孤对电子相互作用，改变了碳原子的化学性质。

A lone pair of watchful eyes───一双注视的眼睛

Wigeon A lone pair of gad wall preened on shrinking tussocks.

So, which atom is in need of those lone pair electrons?

And if we put that in our bond here, we have 1, 2, 3 bonds, plus we have one lone pair left over.

So in oxygen we have a similar situation where, in fact[sentencedict.com], we are not going to promote any of the electrons because we have two lone pair electrons no matter what we do.

For the carbon, we start with 4 valence electrons, we have 0 lone pair electrons minus 4, and we end up with a formal charge of 0.

In this paper(http://sentencedict.com), importance of the lone pair electrons in molecular structure and chemical reaction is expounded by effect of the lone pair electrons.

So how many lone pair electrons do we have?

So, if we want to figure out the formal charge on the carbon, we need to take the number of valence electrons, so that's 4. We need to subtract the lone pair, what number is that? It's 2.

For the first time the significance of lone pairs of electrons, in determining the overall shape of molecules was recognised.