mean curvature短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 平均曲率 This paper set a parallel translation curved surface can be obtained and stick to the sphere if a nonzero constant mean curvature has a proper parallel translation in the normal direction. 本文证明了：对于任一个非零常数中曲率的曲面，如果沿着它的法线方向作适当的“平行移动”则所得的“平移曲面”，可以贴合在球面上。 cnki