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　　Sam是否能秉持自己的人性不步入黑暗面呢？兄弟两人这一次能否战胜恶魔？"What happened later?" I knew the story was far from over, so I couldn't wait to ask him.The Liskov Substitution Principle (LSP) is one of the basic principles of object-oriented design. The Richter substitution principle says that wherever a base class can appear, subclasses can certainly appear. LSP is the cornerstone of inheritance reuse. Only when derivative classes can replace base classes and the functions of software units are not affected can base classes be truly reused, and derivative classes can also add new behaviors to base classes. The Richter substitution principle is a supplement to the "open-close" principle. The key step to realize the "open-close" principle is abstraction. The inheritance relationship between the base class and the subclass is the concrete realization of abstraction, so the Richter substitution principle is the specification of the concrete steps to realize abstraction. --From Baidu故事设定在夜神月与L对决十年之后，世界上发生死亡笔记大量杀人事件，日本死亡笔记对策总部特别小队查出世界上共有六册死亡笔记，围绕这六册死亡笔记，全世界被卷入终极头脑战。The reason why the traditional portal has high-quality content and fast response is that it has invested a lot of editing and has morning and evening shifts. This can solve the problems of timeliness and professionalism, but this model is very heavy and depends too much on people and numbers.1470年。随着时间的推移，梅迪奇的家族权力得到巩固。洛伦佐被要求接替他父亲的位置，因为他对自己生活的一次尝试暴露了他们多年来糟糕的银行管理。作为梅迪奇家族的新首领，他必须照顾他的弟弟朱利亚诺和妹妹比安卡。他娶了克拉丽丝·奥西尼，一位来自罗马的贵妇人，他与波提切利的友谊赋予了文艺复兴的活力。他与教皇西克斯图斯（Pope Sixtus）的反差，使佛罗伦萨迎来了历史上最血腥的时刻，帕齐阴谋。