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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 Baidu平凡女子谢小满阴差阳错之下得罪了吴江府有名的巨鹿郡王赵孝谦，又因他人设局与赵孝谦结下契约婚书，被迫嫁入郡王府。一纸契约让两人生活交织，从开始的欢喜冤家到逐渐相知相守，赵孝谦与谢小满携手历经坎坷，冲破重重阻碍，最终收获了一段浪漫的爱情。"I still remember that after the platoon mate checked with me, he was so angry that he scolded her on the spot and smashed her head with the butt of a rifle. However, what flowed out of her was not white, but some green things, which were very sticky, like a kind of colored oil, or rather like very thick green paint."错误决定？不管怎么说，他们还是不敢当面指责汉王的，哪里还敢继续说下去。他对青鸾公主轻笑道：公主就不要再玩那套把戏了。FOX宣布续订《致命武器》第3季，原主演克莱恩·克劳福德此前因两次行为不当遭到惩戒，他不再参演新一季，西恩·威廉·斯科特(《美国派》《冰川时代》系列)新加盟，饰演一个新角色，将与Murtaugh(达蒙·威亚斯饰演)展开合作。就是死也不去了？嘉靖眯眼道。