二次曲面的母线 [数] generator of a quadric
二次曲面的脐点 umbilics of a quadric
二次曲面的顶点 [数] vertex of a quadric
二次曲面的极点 [数] pole of a quadric surface
二次曲面的共轭直线 [数] conjugate lines in a quadric
二次曲面的二焦点弦 bifocal chord of a quadric
二次曲面的径向面 [数] diametral of a quadric
二次曲面的切线锥面 tangent cone of a quadric
二次曲面的两焦点弦 [数] bifocal chord of a quadric
求二次曲线的面积 quadrature of a conic
本文提出一种全新的，可推广至一般二次曲面的旋转抛物面实时成象的等灰曲度线算法。
This paper presents a new algorithm for realtime generation of rotating paraboloid images, which can be extended into quadric surfaces.
本文应用矩阵的运算，给出求二次曲面的切平面方程的一个筒单方法。
From this paper, the equations of tangent planes of a quadratic surface are obtained by matrix operations.
画法几何学中的难点之一是求解两一般位置二次曲面的交线。
One of difficulties in descriptive geometry theories is to draw the intersection created by two general position intersecting quadric surfaces.
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