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This kind of story and details are everywhere in this book. Historians know that the modern history of China is a dry fact, and the aspects provided by Aban, from the unique perspective of American journalists, are fresh and juicy, and are not well known to us or common to us, thus filling in the gaps, providing references and making history fuller and more complete.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:民国初年，军阀割据，十里洋场，租界林立。而此时的上海滩更是官商勾结，鱼龙混杂，帮会之间争名逐利，相互仇杀。就在这个被称作是冒险家的乐园里，出身于武术世家的马永贞，凭借着自己一身的武艺和一颗炽热的爱国之心，与上海两大帮派展开了一场天翻地覆、风起云涌的斗争，并由此讲述了他虽然短暂，但却充满了传奇的一生。天启快出来说两句。DNF2017 Magic Attack Pearl Collection原来这厮不是因为闲着太久，想要上战场历练，点惦的是首功啊。你也要对我出手？东方不败没有说名字，但是令狐冲知道是对他说的。