The formation of this spiral structure may be caused by the anti-clockwise spin of umbra "A".

这种旋涡结构可能是由于A本影的逆时针自旋运动造成的。

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

它们中的一些可能是顺时针旋转的，在这种情况下，根据右手定则，我们认为它们是向下旋转的。

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An electrical field was then used to apply torque to the rotor, making it harder for the system to spin anticlockwise than clockwise.

电场使旋转器产生了扭矩，这个系统就更易顺时针转动。

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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

Electrons are subatomic spinning tops: Spin up and spin down are the electron's version of clockwise and counterclockwise.

FORBES: Magazine Article