Well, that's a ball -- it's a sphere, and it has a lattice around it -- you know, those squares.
噢 这是一个球 球体 外面有格子状的框架你知道 这些正方形。
英语百科
Square lattice
In mathematics, the square lattice is a type of lattice in a two-dimensional Euclidean space. It is the two-dimensional version of the integer lattice, denoted as Z. It is one of the five types of two-dimensional lattices as classified by their symmetry groups; its symmetry group in IUC notation as p4m, Coxeter notation as [4,4], and orbifold notation as *442.