The plane figure obtained when a surface or solid is intersected by a plane. If the figure has an axis of symmetry and the plane is perpendicular to the axis, then it is a cross section. The sections of a (double) cone are the conics.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。