不过，对于递归函数的使用，人们所关心的一个问题是栈空间的增长。

However, one concern people have with the use of recursive functions is the growth of stack space.

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从前，看到所生成任务的复杂性，组成任务的阶段数量，在使用具有柱状测试或者函数的规则时会增长。

Previously, you saw that the complexity of the generated job, and thus the number of stages composing the job, increases when you use columnar tests or functions with a rule.

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真正的收入是劳动力增长和每工时生产力的函数。

Real incomes were a function of things like growth of the labor force and productivity per work hour.

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Implicit declaration of function increment.

函数增长的隐式说明。

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Because we underestimate the growth of exponential function.

因为我们低估了指数函数的增长。

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