This is where the UML definitions create classes.
就是在这里用uml定义来创建类。
Class: patterns about how to create classes and interfaces.
类：关于如何创建类和接口的模式。
You create classes extending this interface that provide their own implementation of the getFeed() method .
创建扩展这个接口的类，提供其自己对 getFeed() 方法的实现。
Some programmers create classes to organize their work, but it seems that no two programmers have the same ideas about how to write their classes.
一些程序员创建类来组织其工作，但似乎没有任何两个程序员对于如何编写类具有相同的看法。
If you create classes that extend Actor directly or indirectly, try to ensure that all invocations against said objects are done through message passing.
如果创建直接或间接扩展Actor的类，那么要确保对对象的所有调用都通过消息传递进行。
Above all I try to create classes that they will find both stimulating and interesting.
而且我努力设计有趣的具有启发性的课。
Once an interface has been defined, you can create classes that implement the interface.
一旦已经定义了一个接口，你可以生成实现这个接口的类。
Instead, you create classes that represent the database and its tables, and use those classes to interact with data.
而是应创建表示该数据库及其表的类，然后使用这些类进行数据交互。
Instead, you create classes that represent the database and its tables, and use those classes to interact with data.
而是应创建表示该数据库及其表的类，然后使用这些类进行数据交互。
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