The various aspect problems in city construction are more and more complex with cities' scale and up-to-dateness continuously growing.
随着城市规模的不断扩大和城市更新水平的不断提高，城市建设中的各个方面问题越来越复杂。
Dynamic approaches have lots of advantages: they can scale up to larger problems (instead of creating arbitrary limits), and they don't have the problem of truncations causing security problems.
动态方法具有许多优点：它们能够向上适用于更大的问题(而不是带来任意的限制)，而且它们没有导致安全问题的字符数组截断问题。
Problems creep in, however, when we try to scale this up — that is, when we try to gather all requirements, then do all design, then all development, then all testing in a strictly linear fashion.
然而，当我们试图将规模扩大时-也就是说，当我们按照一个严格的线性流程试图搜集所有的需求，并完成所有的设计，所有的开发，进行所有的测试时，一些问题就悄悄地出现了。
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