recursive set

例句：

1. 1. This algorithm is designed to be recursive, allowing for easy modification and expansion.
   这个算法被设计成递归的，便于修改和扩展。
2. 2.The process of recursion is akin to the way we remember things by repeating them.
   递归过程类似于我们通过重复记忆来记住事情的方式。
3. 3.In mathematics, recursion is used to solve problems that can be broken down into smaller, similar problems.
   在数学中，递归用于解决可以分解为更小、相似问题的复杂问题。