短语词组短语affine principal curvature 仿射助率affine mean curvature 仿射平均曲率affine princial curvature 仿射主曲率total affine curvature [数]仿射全曲率radius of affine curvature [数]仿射曲率半径mean affine curvature 平均仿射曲率 返回 affine curvature