生活中，人们只要稍微注意一下，就会发现自己生活在一个充满对称的世界里：每片雪花的晶体是对称的，一只蝴蝶的双翼是对称的，雨滴和行星是球形的，晶体有着某种网络形的对称，星系呈螺旋形的对称，海浪的起伏在空间上是对称的，而大多数动物，如鹰、鲱鱼、大象等则是呈 In life, people just take a little notice and they will find themselves living in a world full of symmetry: the crystals of each snowflake are symmetrical, the wings of a butterfly are symmetrical, the raindrops and the planets are spherical, and the crystal has a certain Symmetrical in the shape of a network, the galaxies are spirally symmetrical, and the undulations of the waves are symmetrical in space, while most animals, such as eagles, squids, and elephants, are present.