The only geometrical object in which every point on the surface is the same distance from the center is a sphere.

唯一一个表面上的每个角到中心距离都相等的几何物体就是球体。

youdao

The only geometrical object in which every point on the surface is the same distance from the center is a sphere.

唯一一个表面上的每个角到中心距离都相等的几何物体就是球体。

youdao