recursive ordinal

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 involves a lot of recursive testing.
   调试过程涉及大量的递归测试。
3. 3. The program was written in a language that supports recursive functions.
   该程序是用支持递归函数的语言编写的。