regular tetrahedron group

例句：

1. 1. The group is made up of regular tetrahedrons with equal sides and angles.
   这个群体由等边和等角的正四面体组成。
2. 2.In physics, a regular tetrahedron is a simple geometric shape composed of four equilateral triangles.
   在物理学中，一个规则四面体是由四个等边三角形组成的简单几何形状。
3. 3. The group's members are dedicated to promoting the development of science and technology in their respective regions.
   该团体的成员致力于促进各自地区科学和技术的发展。