precession axis

例句：

1. 1.The precession axis of the planet is tilted slightly to the right.
   行星的进动轴略微向右倾斜。
2. 2.The scientists used a sophisticated model to predict the precession axis of the new comet.
   科学家们使用了一个复杂的模型来预测新彗星的进动轴。
3. 3.The precession axis of the Earth's rotation causes the seasons to change.
   地球自转的进动轴导致季节变化。