利用共焦点二次曲线束的理论，得出了二次曲线的焦点的一种十分方便的直接算法，并给出了一个计算实例。
By using the theory of common focus conic bundle, a kind of advantageous directness arithmetic about conic's focus is obtained, and an example is given.
通货膨胀率和失业率之间关系，是菲利普斯曲线描述的基本内容，也是经济学争论的焦点之一。
The relation between inflation and employment rate, is expressed by Phillips Curve, and also is one of the focuses of debates of economics.
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。
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.
球面上共焦点之椭圆、双曲线，在球心投影中仍投影成共焦椭圆、双曲线。
The cofocal ellipse and hyperbola of spherical surface will also be projected into the cofocal ellipse and hyperbola in gnomonic projection.
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.
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。
By using transformation thought, this paper obtains the focus chord of all kinds of conic section through analyzing a sample in conic section teaching.
网页版式的基本类型骨骼型、满版型、分割型、中轴型、曲线型、倾斜型、对称型、焦点型、三角型、自由型十种。
First, the basic types of web page layout Bone type, full version type, split type, axis type, curved, inclined, symmet…
网页版式的基本类型骨骼型、满版型、分割型、中轴型、曲线型、倾斜型、对称型、焦点型、三角型、自由型十种。
First, the basic types of web page layout Bone type, full version type, split type, axis type, curved, inclined, symmet…
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