| 单词 | right circular cone |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔cone〕A right circular cone.直立圆锥美国传统〔conic section〕The intersection of a right circular cone and a plane, which generates one of a group of plane curves, including the circle, ellipse, hyperbola, and parabola.圆锥曲线：一正圆锥与一平面相切产生的一组平面曲线，包括圆、椭圆、抛物线和双曲线美国传统〔parabola〕A plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the cone.抛物线：一个直立圆锥和平行于该锥体中轴的平面相交形成的平面曲线美国传统 |
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