摘要
引入相对（偏）导数概念并且说明了其物理意义，特别是指出了其对于运动曲面几何量的研究是一个强有力的工具。
In this paper the relative derivate is introduced with its physics significance explained .Especially it is introduced as a strong tool in studying the geometrical quantities on a moving surface.
关键词
运动曲面
几何量
微分几何
相对导数
relative derivate physics significance geometrical quantities on a moving surface
