表面充气成球面,欧拉大师做贡献;点1线2面为3,点面去线等于2.说明:第一句指的是欧拉定理(V+F-E=2)的适用范围:表面经连续变形能成为球面的多面体;第三句中的点指的是顶点(记为1),线指的是棱(因棱有两个端点而记为2),面指的是多面体的面(因不共线三点确定一个面而记为3);第四句 The surface is inflated into a spherical surface, and Euler masters contribute; point 1 line 2 faces 3, point face lines equal 2. Description: The first sentence refers to the application of Euler’s theorem (V+FE=2): Surface The continuous deformation can be a spherical polyhedron; the points in the third sentence refer to the vertices (remembered as 1), the lines refer to the edges (marked as 2 because the edges have two endpoints), and the faces refer to polyhedral faces ( Because of not determining a face by three points at the same time, it is recorded as 3); fourth sentence