当开发人员创建或者分析一个应用时，他们通常希望通过一些辅助理解代码的结构或者行为的图形化符号来可视化代码。

As developers create or analyze an application, they often want to visualize the code through some graphical notation that AIDS their understanding of the code's structure or behavior.

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另外，对一个团队为酒店所带来的辅助性收入进行检测是大有益处的：他们是否有逛商场和礼品店、停车和使用个人助理等？

Additionally, tracking the amount of ancillary income a group brings to the hotel is beneficial: did they use the outlets, gift shops, parking, valet, etc.?

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当有可能发现新的故事时，用例可以辅助理解。

Use cases can be used to understand where new stories are likely to be found;

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