In this paper, unit moving trihedron is first constructed for a point on the surface of a revolution ellipsoid.

以旋转球体面上某点为原点建立一个大地坐标单位活动坐标。

Isoperimetric inequality for sphere and ellipsoid is discussed, and the isoperimetric inequality of some region satisfying certain conditions is given.

力的变化范围常用力球方程和力球面来。