1·The result of research on laser dual foci technique is presented.
本文介绍了对激光双焦点技术的研究结果。
2·The flatter the ellipse the farther apart the foci and the farther each focus the center.
椭圆越扁平，两焦点之间的距离越远，每个焦点离中心的距离也越远。
3·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。
4·Closed curve, one of the conic sections of analytic geometry, consisting of all points whose distances from each of two fixed points (foci) add up to the same value.
解析几何中圆锥截线的一条封闭曲线，包含了与两个定点(焦点)之距离呈等值增加的所有点。
5·The basic idea is to select a set of objects as foci. And the central focus, the basic vectors and FAC-coordinates can be got by computing.
基本思想是在对象空间选出焦点集，通过计算得到中心焦点、基本向量集和FAC _坐标。