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1·A conic section whose plane is not parallel to the axis base or generatrix of the intersected cone.

圆锥的一部分，其切面既不平行于轴和基面，也不平行于圆锥母线。

2·However, when determining the different orders of four points, there is difference existing in the conic section type.

但是，不同顺序的四点在决定二次曲线类型存在着差异。

3·Given a hexagon inscribed in a conic section, the three pairs of the continuations of opposite sides meet on a straight line, called the Pascal line.

已知一个六边形内接于一条圆锥曲线，那么这个六边形对边的交点位于同一条直线上。

4·By using transformation thought, this paper obtains the focus chord of all kinds of conic section through analyzing a sample in conic section teaching.

利用变换思想，对圆锥曲线教学中的一道例题进行分析，得出了各种圆锥曲线的焦点弦，并引伸其结论，将圆锥曲线的焦点弦变换为中心弦。

5·Thus, we give a make-graph method of conic section on plane with arbitrary point as foci, arbitrary line as directrices and arbitrary positive number as eccentricity.

从而给出了以平面上任意点为焦点、任意直线为准线，任意正数为离心率的圆锥曲线的直接作图方法。

6·Conic section road border model put forward to the form characteristic of the border of road, the ones that have realized to identification line of lane which are followed in real time.

针对道路边界的形状特征提出的二次曲线道路边界模型，实现了对车道标识线的实时跟踪。

7·Theory calculate and finite element method to symmetric conic-section flexure hinges is used to compare and analyze their dynamics characteristic.

通过对四种二次曲线截面的柔性铰链的理论计算和有限元分析，比较分析了它们的力学特性。