敏捷，尤其是短迭代，可帮助你尽早发现问题。
Agile, and specifically short iterations, help you discover problems early.
这对早期的迭代特别重要，那个时候更容易纠正设计问题。
This is particularly important for earlier iterations, when it is easier to correct design problems.
在前面两个例子里,每一部问题的规模缩小了,不管是迭代的还是递归的，这表明这个问题的复杂性可能是线性的。
In the first two cases, the problem reduced by 1 at each step.
主要问题是，每次都要创建迭代器的一个新副本。
The main problem is that we create a new copy of the iterator every time.
因此您可以这样问一个问题：“迭代都是有严格时间控制的吗？ ”？
So one question might be "Were the iterations actually time-boxed?"
同样，可以使用“for”迭代解决这个问题。
有一个螺旋模型与管理问题：你如何安排的迭代？
There is one management problem with the spiral model: how do you schedule the iterations?
对于初值问题，采用上下解的单调迭代方法求解。
Upper lower solutions method and monotone iterative technique are applied to initial value problem.
非线性问题的求解，本文采用了增量迭代法。
The incremental iteration method is applied in the solution of the nonlinear analysis.
非线性问题的求解，本文采用了增量迭代法。
The incremental iteration method is applied in the solution of the nonlinear analysis.
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