整个铜球可以绕一根金属轴转动，转动一周代表一个昼夜。

The sphere is mounted by its poles (corresponding to the celestial poles) on a metal axis, and can rotate around it.

youdao

整个铜球可以绕一根金属轴转动，转动一周代表一个昼夜。

The sphere is mounted by its poles (corresponding to the celestial poles) on a metal axis, and can rotate around it.

youdao