If objects and inheritance go together like chocolate and peanut butter, objects and polymorphism are like hand and glove.
如果说对象和继承就像巧克力和花生酱的话，那对象和多态就好比手和手套。
Anyway, this section talks about UML and class diagrams, inheritance, polymorphism, encapsulation... things they should have shown you in the beginning.
总之，该部分讨论了UML和类图、继承、多态性、封装…一些应该在开头为您介绍的东西。
Leverage object-oriented concepts such as encapsulation, inheritance, and polymorphism.
利用面向对象的概念，如封装、继承和多态性。
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