You might want to find existing use cases for similar types of systems or services.
对于系统或服务类型相似的，您或许希望发现现有的使用实例。
These mappings are used to identify the subset of the existing use-case model that is affected by the project.
这些映射是用于识别受项目所影响的现有用例模型的子集的。
The advantages of linear motor and existing use in lathe are introduced.
介绍了直线电机的优势以及当前在机床上的应用情况。
Through investigating the existing use case description methods, this paper proposes a visual hierarchical model for use case description.
文章在深入研究已有的用例描述方法的基础上，提出了一种可视化的用例描述层次模型。
Through investigating the existing use case description methods, this paper proposes a visual hierarchical model for use case description.
文章在深入研究已有的用例描述方法的基础上，提出了一种可视化的用例描述层次模型。
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