So we can do this for any final charge we have, if we have a molecule that has a charge of plus 2, then all of the formal charges should add up to plus 2 and so on.

对于任意净电荷的情况,我们都可以这样做，比如假设我们有一个带两个正电荷的分子，那么所有的形式电荷加起来应该等于正二，等等。

麻省理工公开课 - 化学原理课程节选

Being and void, being and void, so now I've got my plus two little projectile coming in, and plus two zooms right through.

有和无，有和无，现在带两个正电荷的发射体进来了，两个正电荷正好穿过。

麻省理工公开课 - 固态化学导论课程节选

So, shielding happens when you have more than one electron in an atom, and the reason that it's happening is because you're actually canceling out some of that positive charge from the nucleus or that attractive force with a repulsive force between two electrons.

所以当你们在原子中有多于一个电子,屏蔽就会发生，它之所以会发生的原因是,你们实际上抵消了,一些来自原子核的正电荷,或者来自吸引力,在两个电子之间。

麻省理工公开课 - 化学原理课程节选

If you bring a plus charge near a plus charge, if my body m, has a plus charge and another plus charge is there, it'll feel a force due to that.

如果让两个正电荷靠近,如果一个物体 m 带正电荷,在这里有另一个正电荷,它就会感受到力的作用

耶鲁公开课 - 基础物理课程节选

But once in awhile, one of these plus twos comes in almost on axis, and it gets whipped around by the Coulombic repulsive forces.

但是偶尔一个带两个正电荷的粒子,以接近于轴的位置进入，会快速的移动到周围,由于库仑斥力的作用。

麻省理工公开课 - 固态化学导论课程节选

It could be hydrogen, it could be helium plus, it could be lithium double plus and so on.

它可能是氢，可能是带一个正电荷的氦，也可能是带两个正电荷的锂，等等。

麻省理工公开课 - 固态化学导论课程节选

So, I've got plus twos, zooming in at high energy against a wall of positive charge.

两个高能的正电荷,在正电荷壁垒时会遇到阻力。

麻省理工公开课 - 固态化学导论课程节选

Magnesium would be 2 plus, 2e so in here you would put 2e.

镁带两个正电荷，在这儿写作。

麻省理工公开课 - 固态化学导论课程节选

He shot alpha particles which have a charge of plus two.

他入射的阿尔法粒子带有两个正电荷。

麻省理工公开课 - 固态化学导论课程节选