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追去吧，追去吧，全死了才好。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:Polylactic acid (PLA) is a new bio-based and renewable biodegradable material, which is made of starch raw materials proposed by renewable plant resources (such as corn). Starch raw materials are saccharified to obtain glucose, then glucose and certain strains are fermented to produce high purity lactic acid, and polylactic acid with certain molecular weight is synthesized by chemical synthesis method. It has good biodegradability, can be completely degraded by microorganisms in nature under specific conditions after use, and finally generates carbon dioxide and water without polluting the environment, which is very beneficial to environmental protection and is recognized as an environment-friendly material. This thing is actually a long piece, and then "curled up" in it and wrapped in a cylinder shape. What's the use? You will see it in a short time.Submarine main valve open两个不识彼此的青少年，少男终日沉迷电玩，少女则是身怀六甲，孤独是两人唯一的共通点；为了金钱，他们钻律法漏洞，假扮夫妻，好让婴孩未来过继给少男不孕的叔叔。疏离的两人，尽管共处一室还是少有交集；随着婴儿意外早产，他们被迫拉近距离，多了怀抱里的婴孩，生活突然有了温度。在满室寂 寞之中，爱的声音已悄然在耳边喧哗。年轻女子蚊子(常方源饰)在高速公路被不明人士跟踪、追打并遭遇车祸，被富二代驾车撞击，不治身亡，最终在财权压力下案件私了。然而警官秦枫(朱亚文饰)以及神秘人物童明松(祖峰饰)却在案发现场发现了可疑的蛛丝马迹，觉出案件的蹊跷。陆洁(郝蕾饰)与乔永照(秦昊饰)是一对令人艳羡的夫妻，家庭美满育有一女，并经营着一家公司，衣食无忧。陆洁因为女儿在幼儿园的玩伴宇航小朋友结识了其母亲桑琪(齐溪饰)，却在与其交往的过程中偶然发现了丈夫的外遇，然而在之后的跟踪与调查中，陆洁发现这一切并非偶然，丈夫乔永照与桑琪有着绝非寻常的关系。面对突如其来的家庭变故，陆洁心灰意冷，开始实施一系列计划；而秦枫和童明松将陆洁定为了案件嫌疑人……听闻项羽的宠妃虞姬生下一个男孩，项羽非常高兴，如今可谓是举国欢庆，更是加封虞姬为王后，对外方面没有一丁点的动静