Nested recursion will simply gobble up the variable.
嵌套的递归将更改变量。
To allow recursion, a collaboration structure is nested within a class specification, which means that all instances of that class will have an internal structure specified by the class definition.
为了允许递归，协作结构被嵌套到类的规范中。这就是说这个类的所有实例都将有一个由类定义的内部结构。
50 limits recursion to a depth of 50 nested calls before the application is forced to terminate.
例如，xdebug.max_nesting_level =50 将把递归深度限定为 50 次嵌套调用，然后将强制终止应用程序。
When the surfaces of two mirrors are exactly parallel with each other, the nested images that occur are a form of infinite recursion.
当两面镜子的表面正好互相对着时，所产生的嵌套镜像是一种无限重现的形式。
When the surfaces of two mirrors are exactly parallel with each other, the nested images that occur are a form of infinite recursion.
当两面镜子的表面正好互相对着时，所产生的嵌套镜像是一种无限重现的形式。
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