英汉解释
focus 的复数
百科
百科
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网络词典 (beta)
网络词典 (beta)
与 foci 相关的例句
与 foci 相关的例句- physics of earthquake foci
震源物理 - (optics) having two foci.
（光学）有两个焦点。 - Having the same focus or foci. Used of a lens.
共焦的有共同焦点的。用于透镜 - the longest axis of an ellipse or ellipsoid; passes through the two foci.
椭圆中较长的那个轴；穿过两个焦点的轴。 - the sums of the distances from the foci to any point on an ellipse is constant.
椭圆规是构造椭圆的工具.。 - The flatter the ellipse , the farther apart are the foci , and the farther each focus is from 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。 - (geometry) a ratio describing the shape of a conic section; the ratio of the distance between the foci to the length of the major axis.
描述圆锥曲线部分形状的比率；长轴长度与焦距距离比。