tetragonal bipyramid是什么意思

用法例句

A series of convenient methods for the preparation of the paper-folded regular octahedron, regular tetrahedron, and regular cubic cone are presented here.

介绍纸折正四面体、正八面体和正方锥形的简易制作方法，并推广应用于制作天然硅盐的多种复杂阴离子结构及某些多酸阴离子结构的模型。