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。
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.
实现了对由直线、曲线围成的任意形状区域的裁剪。
Consequently, we can clip the arbitrary shape areas surrounded by line and curve.
提出了一种能把激光束聚焦成任意长度的新型直线聚焦透镜及其可能的应用。
A new type of focusing lens which can focus a laser beam into a line of any length and its possible applications are proposed.
应用推荐