For those who haven't heard the word, precessionis when an object with a nonspherical shape wobbles around its rotation axis.
For those who haven't heard the word, precessionis when an object with a nonspherical shape wobbles around its rotation axis.
如果你还不了解“进动”这个词，进动指的是物体绕它的旋转轴有非球形的摆动。