From comments to packages, including classes themselves, every concept in UML has a metaclass.

从注释到包，包括类本身，UML中的每个概念都有一个元类。

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These tools generally allow for the creation of static and dynamic models of the software, including classes, activity, state, components, and the overall model structure (packages).

这些工具通常允许创建软件的静态和动态模型，包括类、活动、状态、组件和整体的模型结构(包)。

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These tools generally allow for the creation of static and dynamic models of the software, including classes, activity, state, components, and the overall model structure (packages).

这些工具通常允许创建软件的静态和动态模型，包括类、活动、状态、组件和整体的模型结构(包)。

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