| 释义 |
DEFINITIVE EXAMPLES 权威例句〔directrix〕Mathematics The fixed curve traversed by a generatrix in generating a conic section or a cylinder.【数学】 准线:穿过产生圆锥部分或圆柱的母线而形成的固定曲线美国传统〔element〕The generatrix of a geometric figure.几何形状的母量美国传统〔ellipse〕A conic section whose plane is not parallel to the axis, base, or generatrix of the intersected cone.圆锥的一部分,其切面既不平行于轴和基面,也不平行于圆锥母线美国传统 |