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。

youdao

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)。

youdao

Students take full loads of classes, including two or three summers.

VOA: special.2009.07.23

Total returns and value of stock owned (including all classes) is based on Apr. 2, 2004 stock price.

FORBES: Forbes Executive Pay 2004

You can learn about investments in many ways, including books, classes and one-one-one meetings with those who are earning fees for managing the family finances.

FORBES: Is Your Aging Loved One "Losing It"? Five Strategies to Help You Prepare For Managing the Money

This fall, the DVD of that production will be distributed to New York's 1, 700-plus public schools, along with additional teaching materials for classes including English and history.

WSJ: Britain Exports a Double Bill