两种合金的自旋向上能带都具有明显的金属特征，而自旋向下能带有明显的差别；

The majority spin bands of two alloys have visible metallic character and the minority spin bands have obvious difference.

youdao

它能一分为二的，事实告诉我们，电子一定有某种新的性质，我们叫它自旋向上或者自旋向下。

And that the fact that it split into two was telling them that there must be some new property to the electron, and what we call that now is either being spin up or spin down.

youdao

这意味着在一个原子内,每个轨道上可以有两个电子，对吧，因为对任何轨道,我们可以有自旋向上或者自选向下或者两者都有。

So what that means is that we're limited in any atom to having two electrons per orbital, right, because for any orbital we can either have a spin up electron, a spin down electron, or both.

youdao

And that the fact that it split into two was telling them that there must be some new property to the electron, and what we call that now is either being spin up or spin down.

它能一分为二的,事实告诉我们,电子一定有某种新的性质，我们叫它自旋向上或者自旋向下。

麻省理工公开课 - 化学原理课程节选

So what that means is that we're limited in any atom to having two electrons per orbital, right, because for any orbital we can either have a spin up electron, a spin down electron, or both.

这意味着在一个原子内,每个轨道上可以有两个电子，对吧，因为对任何轨道,我们可以有自旋向上或者自选向下或者两者都有。

麻省理工公开课 - 化学原理课程节选

So this one is spin-up plus a half, this is spin-down minus a half.

所以自旋向上是正二分之一，而自旋向下是负二分之一。

麻省理工公开课 - 固态化学导论课程节选