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杨寿全快步上来，搀着夫人道：走吧，玲珑。(未完待续……) show_style();。……《武侠世界》杂志一送来，围在报亭外的人就一哄而上，差点没有抢起来。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　　最后在镇委李书记耐心的工作下，喜家庄和牛老板联营了，加工厂变成了规模化的现代农业综合性公司。党的十七届三中全会召开后，喜耕田光荣地加入中国共产党。其他众人也都反应不一，赵翩翩泪水立即涌了出来，眼前一片模糊，看不清玉米。