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Two implementations:记者何茹和她的小姐妹依兰与小辣椒三个外省女孩因为不同的原因漂泊在南滨。依兰吐出真言，她爱上了宏达实业的老板王海涛，她让曾经采访过王海涛的何茹从旁帮助成其好事，为了多情的依兰，何茹找理由约见王海涛。王海涛开车将何茹拉到远离市区的海岛上，并恶作剧般将何茹留在小岛上一夜未归，何茹被卷入由此引发的矛盾中，面对依兰的一次次误会，何茹有口难辩，友情产生裂痕。她们虽然同时漂泊在海滨，但对生活的态度及命运却截然不同，她们经历着欲罢不能的恋情；经历着一同欢笑一同流泪而又矛盾重重的友情；经历着对未知归宿的迷茫和生离死别的变迁。与此同时，各种各样棘手案件纷至沓来，银行抢劫案、文物展览会盗窃案、矿井爆炸案、宗教团体事件……无一不对莱特曼提出最严峻和最危险的考验。The Liskov Substitution Principle (LSP) is one of the basic principles of object-oriented design. The Richter substitution principle says that wherever a base class can appear, subclasses can certainly appear. LSP is the cornerstone of inheritance reuse. Only when derivative classes can replace base classes and the functions of software units are not affected can base classes be truly reused, and derivative classes can also add new behaviors to base classes. The Richter substitution principle is a supplement to the "open-close" principle. The key step to realize the "open-close" principle is abstraction. The inheritance relationship between the base class and the subclass is the concrete realization of abstraction, so the Richter substitution principle is the specification of the concrete steps to realize abstraction. --From BaiduArtistic one.