What do these electrons represent?
这些电子代表什么？
以电子为例。
And, I've got ten electrons around it.
而原子核周围有10个电子。
And by now, I mean the valence electrons.
迄今为止，我指的是价电子。
How do we put electrons into such a system?
在这样一个系统里我们怎样放置电子呢？
So how many lone pair electrons do we have?
那么我们有多少孤对电子呢？
Electrons range over a large distance.
电子在一个大范围内活动。
How many valence electrons do we have left?
我们还剩下多少个价电子？
Usually, iron loses two or three electrons.
通常情况下，铁原子丧失2-3个电子。
You have two electrons at much lower energy.
两个电子具有较低的能级。
We need to fill in a total of four electrons.
我们一共需要填进四个电子。
So now what we have is four unpaired electrons.
现在我们有4个未配对电子。
It is glowing because electrons are excited.
是因为电子处于激发状态。
So more electrons make the leap to your foot.
所以更多的电子就会跳向你的脚。
Find a couple of electrons, and what have you got?
找到了一对电子之后，看你得到什么了？
This mail is made of 100% recycled electrons.
这封邮件是用100%再生电子写成的。
Both holes and electrons can move around within them.
空穴和电子均可在其内部运动。
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？
At the end of the day you have some unpaired electrons.
今天的最后，你有些未成对电子。
We actually need to think about those valence electrons.
我们需要考虑这些价电子。
But, the oxygen has taken two electrons from the sulfur.
但是，氧从硫那里得到了2个电子。
The electrons go on to form a useful direct current.
这些电子然后形成一种可被利用的直流电。
In any material, electrons can exist at different energy levels.
在所有材料中，电子都可以以不同的能级存在。
If you have multiple electrons we can lose them in sequence.
如果你有成倍的电子，按照一定的次序失去它们。
Step six is thinking about do we have any bonding electrons left?
第六步是想一想我们有多少个成键电子剩下？
The positive charges do not move about; but the electrons do.
正电荷不能到处移动，可是电子却能到处移动。
As the electrons jump from orbit to orbit, light is produced.
当电子在轨道间跳来跳去时，光产生了。
For our step two, what we need is number of valence electrons.
我们的第二步，需要知道价电子的个数。
Should I put an extra pair of electrons here, does anyone think? No.
我是不是应该在这里再放一对电子呢，有人认为应该吗？不应该。
Should I put an extra pair of electrons here, does anyone think? No.
我是不是应该在这里再放一对电子呢，有人认为应该吗？不应该。
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