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Public class Source {李小龙（吴大维饰）年少时始痴迷武术，拜咏春一代宗师叶轩（徐二牛饰）为师。小龙挑战同学石少虎（吕颂贤饰）为师。小龙挑战同学石少虎（吕颂贤饰）却饮恨败于半招之内，后又与莫逆之交唐发（张家辉饰）为救人与人打架，惹下大祸！因此，龙父李百川（刘家良饰）决意送他真诚美留学。Air Blade and other skills scratched on the ground are damage magic skills, because these skills are all slower than Batman damage triggering. That is to say, there will be little spill damage.修车工阎涛平日受尽老板的欺辱，打斗中误杀老板。逃到偏远的青石镇库区躲避生活。看水库的老李是阎涛的远房亲戚，把阎涛安排在一个旷野中独立的别墅里。但是老李严禁闫涛去二楼。闫涛某夜隐约听到楼上有声音，强大的好奇心驱使阎涛走向了二楼。推开门的那一刻阎涛发现了一个惊天秘密……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 Baidu6.5 Mixing mode-Zhao Zhou (Founder of the Book Dismantling Gang)