A more expressive and reusable domain model can emerge when you transfer common object-oriented concepts such as inheritance and polymorphism to the database via a framework like Hibernate.
通过Hibernate等框架把继承和多态性等面向对象概念应用于数据库，就能够产生表现力和可重用性更强的领域模型。
Traditional object technology provides good code reuse with the encapsulation, inheritance and polymorphism.
传统的对象技术通过封装、继承及多态提供了良好的代码重用功能。
Using the encapsulation, inheritance and polymorphism of OOP, a foundation class library of small satellite software is designed, the detail design of all base classes is introduced.
利用OOP的封装性、继承性和多态性，设计小卫星软件的基本类库，介绍各个基本类的具体设计思想。
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