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