面的

Motive has many sides and multiple level, and among them chief has objective irritate aspect, an action aspect and cognition as well as a society environment aspect.

影响体育锻炼的活动动机的心理因素是多方面和多层次的，其中主要有目标刺激方面的、行为方面的、认知方面的以及社会环境方面。

The paper gives the position vector field of the rotational spacelike hypersurface in Lorentz-Minkowski space. After computing the principal curvatures and solving the differential equation system, it proves the existence of the rotational spacelike hypersurface about given principal curvature function in Lorentz-Minkowski space.

给出（n，1）型Lorentz-Minkowski空间中给定主曲率函数的旋转类空超曲面的位置向量场，通过计算超曲面的主曲率，证明了这类超曲面的存在性。

The researches on the aspects of the magnetic field are mainly confined to the static characteristics of the PM spherical motor, which cannot display a complete picture of the performance of the PM spherical motor. It restricts the research progress of spherical motor control greatly.

关于磁场方面的研究主要局限于永磁球形电动机静态特性方面的研究，无法全面展现永磁球形电动机的性能，这也大大制约了球形电动机控制方面的研究进展。