The types Origin and Destination mimic the design I originally outlined in my UML diagram when I use extension base="Address" to show that they inherit the characteristics of Address.
类型Origin和Destination模仿了我最初在UML图中所勾画的设计，这里我使用extensionbase="Address"来表明它们继承了 Address 的特征。
The types Origin and Destination mimic the design I originally outlined in my UML diagram when I use extension base="Address" to show that they inherit the characteristics of Address.
类型Origin和Destination模仿了我最初在UML图中所勾画的设计，这里我使用extensionbase="Address"来表明它们继承了 Address 的特征。
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