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Contents ·zhí jìng ·Jie-speed, direct ·Connection circle two straight lines through the center of the circle diameter, said connecting sphere two straight line through the star center, said ball diameter ·No. 4 ·币市术语 ·百科辞典 ·English Expression ·French Expression ·Related Phrases ·Containing Phrases ·More results... zhí jìng 　　Through a plane figure or three-dimensional (such as round, conical section, ball, cube) centered straight baseline Translated by Google Jie-speed, direct 　　Jie-speed, direct. Sima Han such as "Ren Fu": "facing west toward the Kunlun shortage of rolling Mud suddenly Xi, Chi diameter, almost three crises." Translated by Google Connection circle two straight lines through the center of the circle diameter, said connecting sphere two straight line through the star center, said ball diameter 　　Connection circle two straight lines through the center of the circle diameter, said connecting sphere two straight line through the star center, said the ball diameter. Include Song Shen, "Meng Xi Bi Tan skills": the "round diameter than income, to join in diameter, to cut the arc field." Liu Pin-yen, "a man and his shadow": "This is a two-ton capacity boiler, four carcass a meter in diameter . " Translated by Google No. 4 　　直径是通过圆心且两个端点都在圆周上的线段.一般用字母d表示. 　　直径的两个端点在圆上，圆心是直径的中点。直径将圆分为面积相等的两部分,中间的线段就叫直径（每一个部分成为一个半圆）。在同一个圆里，直径等于半径（r）的二倍。 　　圆锥曲线的平行弦的中点的轨迹，叫做圆锥曲线的直径． 币市术语 　　直径：这是国家发行金银币需规范的一个重要数据，不仅是生产铸造时计算成色、重量不可缺少的，也是钱币发行规范化的重要依据，以保持货币形制的一致性及信用性。 直径符号:Φ 百科辞典 　　直径 　　diameter 　　　　直径【创恤md份;八“aMeTp} 　　1)二次曲线的直径(dian犯terofa涨戈ond一order 　　clu、℃)是通过平行弦中心的直线.称直径相对被它平 　　分的弦(以及相对这些弦的方向)是共扼的(conju- 　　即te).有心二次曲线的直径在曲线中心彼此相交;无 　　心二次曲线的直径是平行的(或者重合).椭圆和双曲 　　线的直径是通过其中心的直线.抛物线的直径是抛物 　　线的轴以及与轴平行的直线. 　　2)度量空间中集合的直径(dian犯terofaset)是 　　集合的各对点之间的距离的最小上界. 　　　　 English Expression n.:  diam,  gauge,  diameter,  straight line connecting the centre of a circle or sphere, or of the base of a cylinder, to two points on its sides adv.:  across French Expression n.  diamètre Related Phrases geometry circularity math cyclopedia language physics chemical industry applied mathematics corner mensuration configuration forestry order stand field land Of throwing Containing Phrases diametral pole