recursive game

例句：

1. 1.The algorithm is designed to be recursive, allowing for easy modification.
   这个算法被设计成递归的，便于修改。
2. 2. The process of debugging requires a recursive approach to identify and fix errors.
   调试过程需要采用递归方法来识别并修复错误。
3. 3.The program uses a recursive function to calculate the factorial of a number.
   程序使用一个递归函数来计算一个数的阶乘。