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Next, we will talk about the responsibility chain mode. There are multiple objects, each of which holds a reference to the next object, thus forming a chain on which requests are passed until an object decides to process the request. However, the sender does not know which object will process the request in the end, so the responsibility chain mode can be implemented to dynamically adjust the system without concealing the client. Let's look at the diagram first:Four: Understanding the Agency ModelThe above machine is limited to recharging Manaka and cannot sell subway tickets or Manaka. It is still very convenient to recharge.相貌奇丑的金融专业高材生林无敌求职几番挫败，终收到梦寐以求的国内知名广告公司“概念”的面试通知，可是与她竞争新任总裁费得南秘书一职的是拥有天使面孔、魔鬼身材的性感女郎裴娜。本来，林无敌毫无胜算，因为费得南是出了名的花花公子。但从亦是“色鬼”的亲信吴庸口中得知裴娜会是女友李安茜安放在自己身边的“炸弹”后，不想得罪女友的费得南做出了同时任用林无敌与裴娜的决定，前者主管工作上的大小事物，后者象征性地饰演“花瓶”。林无敌的相貌起初遭到公司一帮同事的嘲笑，可是善良乐观的天性令她渐渐与“拜金女”张凌、“款女”苏蕾、“肥女”马莎莎、“神女”小艾等人成为了朋友，出色非凡的工作能力也令费德南感慨找到了得力助手。相反，骄横臭美的裴娜逐渐混成了许多人欲除去的肉中刺。但广告导演、“挑剔男”陈家明以及李安茜等人对她俩的态度截然相反，林无敌在他们眼中是十足的“扫把星”。她是机场安检，安全检查是她的义务和责任，而这次她检查的人，却是她熟悉又多少次魂牵梦萦的脸……与曾经深爱之人再次重逢，有多少尽在不言中。Keep your name, keep your name and look at it slowly.