Home 8.5.3 UML2.0中的相关变化 8.5.3 UML2.0中的相关变化 8．扩展区域 扩展区域（Expansion Region）是活动的一个内嵌套的区域，代表一 个结构化的活动，它按照输入重复执行。
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屋顶用作社交区的扩展区域，不用时也能存放两辆小车。
The rooftop of it, is used as expansion of the social sector and also to save two cars when not in use.
例如，团队可以将产品工作组织为客户端区域、服务器区域和扩展区域。
For example, a team could organize the product work into a client area, a server area, and an extensibility area.
为了确保这些服务能够在扩展区域轻松地享受到，道路间的间隔设为2公里。
To ensure that these services can be easily reached from any point in the expansion area, the roads are spaced about 2km from each other.
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