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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女演员吉冈里帆久违3年将单独主演定于9.20日上映、森淳一导演的电影「看不见的目击者」，本片翻拍自2011年上映的韩国电影「盲证」，讲述了主人公在交通事故现场感觉到车内有被绑架的女高中生，为了解决案件而奔走的故事。《行尸走肉第四季》故事发展到第四季，监狱避难营中的人数不断地增长着，生活也渐渐步入了正轨，正当大家以为平静的日子终于来临之时，总督（大卫·莫瑞瑟 David Morrissey 饰）的逆袭让瑞克（安德鲁·林肯 Andrew Lincoln 饰）一行人再度陷入到了水深火热之中。四个军医大学毕业的女孩，满怀对爱情和事业的向往，分赴各自新的天地，她们是乔思雨、刘莎、王小卉和孙微。能说话、拥有自我意识的三辆交通工具型的机械生命体“炎神”。与喜欢破坏环境、制造污染公害的机械生命体蛮机族的三位大臣，在异世界 机械世界中交战。虽然炎神成功击退蛮机族，但是蛮机族的三位大臣却趁机从异世界 机械世界逃了出去。顿时，满堂人众把眼珠子全瞪出来了。