如您在题目中所见到的，阶段和里程碑评审的整个过程与上面描述的阶段评审类似。

As you can see from the titles, the overall process flow for phase and milestone reviews is very similar to that of the periodic review described above.

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一般语言过于灵活，以致于你可以用任何方式描述任何你想要描述的东西，这就意味着使用它难于验证你最终是否达成了开始时确立的问题目标。

It's so flexible that you can use it in any way that you want to describe almost anything you want. Which means it's also hard to verify if you have at the end what you intended to have at the start.

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例如，Security的主题题目既可以对安全性的内容进行分类，又可以描述Web站点或帮助系统内容中的安全性。

For instance, the subject topic for security can both classify content about security and describe security within the Web site or help system content. Figure 5 illustrates this scenario.

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