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Application scenario: Mediator mode is generally applied to situations where a group of objects communicate in a well-defined but complex way, and situations where you want to customize a behavior distributed in multiple classes but do not want to generate too many subclasses.　　Peter和Nathan也将试图回到过去的生活中, Peter将拯救他人的生命, 但是这将使他和家族, 朋友产生隔阂,但是Peter将和一个"能力强大"的美丽女子坠入爱河, 这会让他发现生活真正的乐趣在于与人交流. 而Nathan每天都将对自己有新的发现,因为事实上他是Sylar.The best defense于是神宫寺看到了好友变成金发碧眼美少女姿态的样子…！？在法国生活后，西奥回到泰国，在他父亲的学校学习。住在泰国再次让他的环境焕然一新，但他确实交了一个朋友Ak。西奥在图书馆里找到一本欢迎他的书，作者签下了Enchante，法语的意思是很高兴见到你。西奥对这个迷人的家伙很好奇，并告诉了Ak这件事。Ak很快暴露了情况，四个家伙站出来声称他们是Enchante。西奥会成功猜出自称是他的4个家伙中谁是真的Enchante吗This is the basis of the opening and closing principle, and the specific content: interface-oriented programming, relying on abstraction rather than concreteness. When a specific class is used when writing code, it does not interact with the specific class, but interacts with the upper interface of the specific class.