One of the more powerful, and also overused, aspects of object-oriented design is inheritance.
面向对象的设计的一个更加功能强大、通常也被过度使用的方面是继承。
Inheritance by extension is a common object-oriented design and is easily expressed through showing abstract classes in UML.
通过扩展来进行继承是一种常见的面向对象设计，很容易通过在U ML中显示抽象类来表达这种继承。
Inheritance by extension is a common object-oriented design and is easily expressed through showing abstract classes in UML.
通过扩展来进行继承是一种常见的面向对象设计，很容易通过在U ML中显示抽象类来表达这种继承。
应用推荐