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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:故事的背景设定在饰演刑警的诸井情（远藤宪一饰演）追捕连环杀人案件的犯罪嫌疑人的拍摄片场。然而，拍摄期间发生了状况，陷入不得不重新拍摄的局面，而诸井情的对手戏演员们已经离开了片场……这时赶来救场的，是碰巧正在片场附近的著名演员们。同样的故事让不同的演员来出演会有怎样的不同？演员们的演技也可能给电视剧带来预料之外的化学反应，这就是本剧想要探讨的主题这是一部反映现代青少年青春期生活的校园偶像剧，故事从一群热爱篮球但是水平不高的初三男生和同年级篮球最强班五班之间以球会友的故事开始。只要我一死，想必所有人都会幸福快乐。　《逆缘》是一部由香港电视广播有限公司制作，黎耀祥、姜大卫、林夏薇、夏文汐等主演的香港tvb电视剧。Originated in Norway, it is related to people's hunting activities in winter and is a skiing and shooting competition. In 1960, the 8th Winter Olympics renamed this event Biathlon and listed it as an official competition. In 1992, women's competitions were added to the 16th Winter Olympics.