Fermat's spiral

例句：

1. 1. The Fermat's spiral is a mathematical pattern that appears in many areas of mathematics.
   费马螺旋是数学领域中出现的一种模式。
2. 2. The Fermat's spiral has been used to study the behavior of complex systems.
   费马螺旋被用来研究复杂系统的动态行为。
3. 3. In this example, the Fermat's spiral is used to demonstrate the concept of symmetry.
   在这个例子中，费马螺旋被用来展示对称的概念。