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The parameter factory can be a function, an object or a string. ?An old, but dignified and magnificent voice sounded.老两口虽没追着逼着要孙媳妇，只是每每想起葫芦已经娶了媳妇，心里就极不痛快。年收入超过五十万，且被网站认为很有潜力，或者有过两本均定超过两万的作品，即为名家。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　　反恐基地总指挥长常建安为了治疗钟原的内心创伤，派遣钟原远赴西南边境训练一支融合高科技作战的反恐特战队。队员有出身开锁世家擅长破译密码的麦萌萌，口技世家擅长作战掩护的郑小虎，国术世家擅长突击作战的小方，中医世家擅长作战急救的周一指，翻译世家擅长语言天赋的高冷女神田克难。钟原的老冤家乔大鹏调任小队副队长。两人多年来互相视为一生最大的对手。钟原在训练反恐小队的过程中，逐渐从矛盾不断到团结配合，和乔大鹏的关系也从竞争对手变成生死兄弟。