directrices

常见例句

A fixed point whose relationship with a directrix determines a conic section.
焦点一个与准线的关系决定圆锥形状的定点
A solid bounded by two parallel planes and such a surface,especially such a surface having a circle as its directrix.
圆柱体由两个平行平面和这样的表面，特别是有一个圆作为其准线的平面所形成的柱体
A solid bounded by two parallel planes and such a surface, especially such a surface having a circle as its directrix.
圆柱体由两个平行平面和这样的表面，特别是有一个圆作为其准线的平面所形成的柱体
The coastline is the base directrix divides the region of sea and land management.
海岸线是划分海洋与陆地管理区域的基准线。
The surface generated by a straight line,the generator,passing through a fixed point,the vertex,and moving along a fixed curve,the directrix.
锥面由一条直线，即母线，通过一固定点，即顶点，沿一给定曲线，即准线，连续移动而产生的平面。
The surface generated by a straight line, the generator, passing through a fixed point, the vertex, and moving along a fixed curve, the directrix.
锥面由一条直线，即母线，通过一固定点，即顶点，沿一给定曲线，即准线，连续移动而产生的平面