All you need to do is create an interface that describes the abstract behavior the Collection should provide.
只需创建一个接口，用它描述Collection应该提供的抽象行为。
The focus of criminal objectivity on abstract man, abstract behavior and abstract methodology constitutes an intellectual approach which is designed to rationalize punishment strategy.
刑法客观主义对抽象人、抽象行为的特别关注和对抽象研究方法的情有独钟既有知识论的背景，又是出于合理安排惩罚策略的考虑。
When referring to the classes Open Close Principle can be ensured by use of Abstract classes and concrete classes for implementing their behavior.
当提及类的打开关闭原则，它可以通过抽象类和实体类实现行为的方式来确保。
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