哪怕是这个运动的基本原理，我也要花一百万年才能解释清楚，因为旋进是相当复杂的。
It will take me a million years to explain even just the basics of this movement as precession is quite complex.
其实原理非常简单：同样一张一美元钞票，使用两次之后，便具有相当于两张一美元的效力；相同数量的黄金储备发挥了两倍的作用。
The principle advanced is simple: the same dollar bill, used twice, is as effective as two individual dollar bills; the same amount of gold reserve has done twice the work.
地震预警的原理相当简单。
The principle behind earthquake early warnings is fairly straightforward.
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