And some of them might be spinning clockwise, in which case, according to the right-hand rule we would consider them spin-down.

而另一些电子则是在顺时针自旋，在这种情况下，根据右手定理,我们会以为它是在向下转。

麻省理工公开课 - 固态化学导论课程节选

And, in any arbitrary crucible full of molten silver, half of them are going to be spin-up and half of them are going to be spin-down.

并且，在任一个浇满了熔银的坩埚中，银原子中的电子一半是向上转,另一半是向下转。

麻省理工公开课 - 固态化学导论课程节选

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

So one goes spin-up and the other goes spin-down.

所以一个是自旋向上，另一个是自旋向下。

麻省理工公开课 - 固态化学导论课程节选

Likewise with 2s, spin-up, spin-down.

s层也是这样，自旋向上，自旋向下。

麻省理工公开课 - 固态化学导论课程节选