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听闻项元帅不在彭城，也不停留，立即去了盱眙。胡钧断然道：不行。Figure 1The 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与怪兽们缠斗上百年的亚伯拉罕·范·海辛（吉姆·加菲根 Jim Gaffigan 配音），意图利用这次千载难逢的机会将死对头德古拉以及他的伙伴们一网打尽……最高学历只有高中鉴定考试，外语能力全无、特长全无、技能全无的张克莱（任时完 饰），孤独的人生里除了围棋一无所长。少年时因为家庭变故，报考韩国棋院研究生落选后，一直自暴自弃、碌碌无为。在26岁还在打零工的他，凭借关系空降进入综合贸易公司变成营业3组的一名实习生。入职第一天的张克莱连复印机都不会使用，接电话这种小事也要求助同是实习生的安英依（姜素拉 饰）。初入职场的他面对周围外语水平一流、工作能力卓越的同事们，马上被巨大挫折感包围，觉得自己格格不入、无地自容。同时，张克莱空降兵的特殊身份曝光后，马上受到了同期实习生们的质疑和排挤。顶头上司营业3组的吴科长（李圣旻 饰）也对张克莱的身份耿耿于怀。这让张克莱认识到一无所有的自己，唯有比所有人都要努力才能在这里生存下去……