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Liskov Substitution Principle, LSP (Richter Substitution Principle) means that subclasses must replace their parent types. In other words, in the process of software development, after the subclass replaces the parent class, the behavior of the program is the same. Only when the subclass replaces the parent class and the function of the software is not affected can the parent class be truly reused, and the subclass can also add new behaviors to the parent class. In order to look at an example of violation of LSP principles, the specific code is as follows:尹旭心中不断的自问着：难道我就这样死去吗？之前一路走来风风雨雨，大江大河都过了，不想在这小河沟底翻了船……浸泡在冰冷河水里，尹旭只感觉自己的意识越来越模糊，伤口的疼痛似乎也逐渐感知不到。穿越天玄界，开局竟是辣鸡门派掌门人！都市氪金人重生游戏异界，拿玩家当走狗，收世界主角做小弟，看我怎么走向人生巅峰。Rare pearl　　Sharon Horgan饰演担心妹妹的Shona﹑Aasif Mandvi饰演Shona男友Vish﹑Tobias Menzies饰演女主其中一名学生的父亲Richard﹑Indira Varma饰演女主同事兼好友Charlotte。