vi.重现，再发生，反复出现

原形：recur第三人称单数：recurs过去式：recurred过去分词：recurred现在分词：recurring

Old memories constantly recur to us.
往事经常浮现在我们的脑海里。
Tom's illness is likely to recur.
汤姆的病有可能再复发。
We recurred to the reform of the economic structure.
我们又提起经济体制改革问题。
The algorithm uses recursion to solve complex problems.
该算法使用递归来解决复杂问题。
In computer science, recursive functions are often employed to traverse data structures like trees or lists.
在计算机科学中，经常使用递归函数来遍历树或列表等数据结构。
The concept of recursion is central to the study of fractals.
递归的概念是分形研究的核心。
The factorial function, denoted by 'n!', is defined recursively as n! = n * (n-1)! for all positive integers n.
阶乘函数'n!'的定义是递归的，即n! = n * (n-1)! 对于所有正整数n。
In mathematics, the Fibonacci sequence is generated using a recursive formula.
在数学中，斐波那契数列是通过递归公式生成的。
The recursive nature of the problem made it challenging to debug.
问题的递归性质使其调试起来具有挑战性。
When painting, the artist used recursion to create an illusion of infinite depth in the landscape.
在绘画时，艺术家使用递归来创造出风景的无限深度错觉。
The recursive process in the manufacturing system allowed for efficient production of identical parts.
制造系统中的递归过程使得高效生产相同部件成为可能。
To understand recursion thoroughly, one must grasp the base case and the recursive case.
要完全理解递归，必须掌握基本情况和递归情况。
In linguistics, recursion is a key feature of human language, enabling the creation of complex sentences.
在语言学中，递归是人类语言的关键特征，它使我们能够构建复杂的句子。