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哎呀，这是怎么回事啊？我都等了三个时辰了，还没见出来？是啊，平常两个时辰就会出来的。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:该来的总会来，正当杨长帆埋头于工坊灰头土脸的时候，他被亲妈亲手拉着奔回家去，房中翘儿正坐在床上美滋滋地摸着肚子，沈悯芮在旁边端茶送水。影片讲述了一名退隐王牌保镖为救女儿与一群亡命之徒展开殊死决斗的故事。达容曾是东南亚最顶级保镖，在一次执行任务的过程中，行动失败导致兄弟惨死，妻子也因意外去世，伤心失意的达容从此退隐江湖过上了平凡的生活。不料叛逆的女儿遇人不淑，不小心卷入了一桩罪恶的毒品交易中，并被亡命之徒绑架，为救女儿，达容不得不重出江湖，孤身踏上营救险途……玄龟配玄武，还有比这更绝配的么？将来生一窝小乌龟……想着满地乱爬的小乌龟，他浑身一激灵，赶忙把这念头掐灭，觉得这么比喻好像不大好，忒不像了。金鹰卡通卫视将推出一档大型原创幼儿成长真人秀节