宇宙中的许多事物都具有某种对称性，从基本粒子、分子的结构，到晶体以及蛋白体的空间点阵排列；从雪花、树叶的形态，到动物躯体以至天体的外观；从简单机械运动、天体运动，到放射性原子的衰变以至电磁波的辐射，无不显示出优美和谐的对称；自然界绚丽多彩的对称性，为数学 Many things in the universe have certain symmetries, ranging from the structure of elementary particles and molecules to the spatial lattice arrangement of crystals and protein bodies; from the appearance of snowflakes and leaves to the appearance of animal bodies and even celestial bodies; from simple mechanical movements. The movement of celestial bodies, the decay of radioactive atoms, and the radiation of electromagnetic waves all show a beautiful and harmonious symmetry;