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影片围绕孙老大神秘的创造奇迹的锅底秘方展开，在重庆某条美食街上，孙老大（罗家英饰）的火锅店因其锅底味道奇佳而闻名遐迩，引来众多竞争对手觊觎他的锅底秘方。马大狗（姜超饰）、马二狗（庞勃饰）两兄弟为了自家的火锅店能在美食街站稳地盘，千方百计找到了对美女花言巧语、对合伙人油嘴滑舌、开溜第一、阅历赛过任何一个混混的唐少爷（袁成杰饰），并成功抓住唐少爷的把柄，威逼他帮忙偷秘方，并由此做出了一系列爆笑行为，令众人大笑同时，又感甚囧、甚雷。影片由此引发了一系列国产“计中计”、“谍中谍”的爆笑偷盗事件，却又在最后发现了一个被隐藏了多年的大秘密……　　Tango不知怎的，走进一个古怪的树洞，等爬出来时，竟然置身在60年代。小葱气得眼圈红了，眼泪就要掉下来。Seven: Template Method Mode 讲述了一个20岁新生的大学生都会经历的不受约束的"人性"故事。Some software developers always want to set up a certain design pattern when designing programs. In fact, this is wrong and they do not really master the idea of design pattern. In fact, many times readers use a certain design pattern, but they just don't know what the name of this pattern is. Therefore, when designing programs, we should use appropriate design patterns according to our own understanding.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: