利用简单的价电子成键理论，我们预计，要把所有甲烷中没有配对的电子，和氢原子中没有配对的电子配对来形成键。
So, using our simple valence bond theory, what we would expect is that we want to pair up any unpaired electrons in methane with unpaired electrons from hydrogen and form bonds.
本质上就是由于，未配对电子配对导致的成键。
Essentially what you have is bonds resulting from the pairing of unpaired electrons.
因为我们有一对，在2s轨道里已经配对了，所以只剩下两个电子可以用来成键。
Because we have paired set in a 2 s orbital, so all we're left essentially is two electrons that are available for bonding.
在配对状态下，关闭耳机如再开机时按功能键一下，会自动连上。
In pairing mode, press and release the function key once when re-start the headset after switch off, it will connect the phone automatically.
在前面一节，我讨论了价键法&电子配对理论。
In the preceding section we discussed the valence bond ( vb) or electron-pair theory of bonding.
因此，电子自旋配对不是共价键形成的原因，也不是先决条件，电子自旋配对只是双电子共价键的一个特点。
Therefore, the spin pairing is not cause of the formation of covalent bond, it is not also condition of first determining, the spin pairing is the only particularity of covalent bond of two electrons.
在化学键形成时并不是电子配对的结果，而是电子从能量较高的原子轨道转移到能量较低的成键的分子轨道上使体系能量降低的结果。
It is not result of spin pairing to form chemical bonds, Instead, transfer electron from the atomic orbital of taller energy to the moleen -lar orbital of lower energy.
在化学键形成时并不是电子配对的结果，而是电子从能量较高的原子轨道转移到能量较低的成键的分子轨道上使体系能量降低的结果。
It is not result of spin pairing to form chemical bonds, Instead, transfer electron from the atomic orbital of taller energy to the moleen -lar orbital of lower energy.
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