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1·The Earth's axis in its orbit does the same thing because of a phenomenon called precession, and is now facing a different star than it did 5, 000 years ago.

地球的地轴做了类似的事情，因为一种现象叫做岁差，现在所面对的是与5000年前不同的星星。

2·What happens to the precession rate if the orbit around a black hole is made nearly as small as possible, i. e. a slight elongation of the innermost stable circular orbit?

如果将围绕黑洞的轨道调至尽可能的小（即轻微拉长最内层的稳定圆形轨道），对岁差率有何改变？

3·Besides, we study the spin precession in one-dimensional ballistic system with three different forms of spin-orbit coupling.

此外，我们研究了在三种不同形式的自旋轨道耦合下一维弹道系统中的自旋进动。

4·Using transformation of velocities and time dilation, Thomas precession is derived and applied to deduce the spin-orbit interaction energy.

利用速度变换给出托玛斯旋进，并应用于玻尔氢原子；利用时间膨胀给出托玛斯角速度；最后计算轨道自旋相互作用能．。