二次曲面

generator neutral point

发电机中性点

generator motor 发电电动机 | generator neutral point 发电机中性点 | generator of a quadric 二次曲面的母线

osculating plane

密切平面

osculating parabola 密切抛物线 | osculating plane 密切平面 | osculating quadric 密切二次曲面

osculating sphere

密切球面

osculating quadric 密切二次曲面 | osculating sphere 密切球面 | osculation 密切

axis of a pencil of planes

平面束的轴

柱轴 axis of a cylinder | 平面束的轴 axis of a pencil of planes | 二次曲面的轴 axis of a quadric

surface, photosensitive

光敏(感表)面

光电表面 surface, photoelectric | 光敏(感表)面 surface, photosensitive | 二次曲面 surface, quadric

proper point of inflection

固有变曲点

proper point 固有点 | proper point of inflection 固有变曲点 | proper quadric 真二次曲面

principal axis transformation

主轴变换

椭圆(二次曲面)主轴 principal axis of ellipse (quadric) | 主轴变换 principal axis transformation | 主页;主枝 principal branch

projective property

射影性质

projective principal normal 射影吱线 | projective property 射影性质 | projective quadric 射影二次曲面

projective relation

射影关系

projective quadric 射影二次曲面 | projective relation 射影关系 | projective representation 射影表示

hyperbolic projectivity

双曲性直射

双曲点 hyperbolic point | 双曲性直射 hyperbolic projectivity | 双曲型二次曲面 hyperbolic quadratic surface

overturned：倒转的

倒转的 inverted | 倒转的 overturned | 倒转点 inversion point

remind sb of/about sth：使某人想起

9. on the go 忙碌, (整天)奔忙 | remind sb. of / about sth. 使某人想起... | have fun 取乐