It also demonstrates how the recursion of the function execution works.
这也解释了函数执行的递归是如何实现的。
For those of you who are new to computer programming, here's a simple definition of recursion: recursion occurs when a function calls itself directly or indirectly.
对刚开始接触计算机编程的人而言，这里有递归的一个简单定义：当函数直接或者间接调用自己时，则发生了递归。
Known as lambda calculus, it was designed to investigate the function definition and application, as well as the concept of recursion.
它被称为lambda演算，用于研究函数定义与应用程序以及递归概念。
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