在现实世界中,对称是一个极为普遍的现象.人体就具有典型的轴对称特点.试想一下,若我们仅有一只眼、一个鼻孔、一只耳朵、一只手和一条腿,会是何等模样?大自然所展示出的对称结构(如轴对称、中心对称)充满着无限的魅力.我们惊诧于具有完美对称性的植物叶子和娇艳的花朵,感慨于动物世界中生物的对称性结构.而人类又以“对称”的眼光来审视大自然,从而创造了许许多多具有对称性的艺术品、服饰和建筑物等. In the real world, symmetry is an extremely common phenomenon. The human body has typical characteristics of axial symmetry. Imagine if we have only one eye, one nostril, one ear, one hand, and one leg. The symmetrical structures (such as axisymmetrical and central symmetry) exhibited by nature are full of infinite charm. We are amazed at the symmetrical symmetry of plant leaves and delicate flowers, and feel the symmetry of the creatures in the animal world. Human beings also looked at nature with a “symmetrical” vision, thus creating many symmetrical works of art, costumes, and buildings.