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User class unified interface, User1 and User2 are different objects respectively, and they are related. If the mediator mode is not adopted, the two need to hold references to each other, so the coupling degree between the two is very high. In order to decouple, the Mediator class is introduced to provide unified interface, and MyMediator is its implementation class, which holds instances of User1 and User2 to control User1 and User2. In this way, User1 and User2 objects are independent of each other. They only need to maintain a good relationship with the Mediator, and the rest is maintained by the MyMediator class! Basic implementation:1949年10月1日这一天，关押在渣滓洞女牢的江竹筠得知中华人民共和国成立的喜讯，在高兴的同时，他们也意识到更加残酷的斗争即将来临。为了鼓舞狱友们的斗志，她和女牢的姐妹们在心中绣了一面五星红旗。 　　Lucy Worsley's Nights At The Opera, a two-part series featuring Sir Antonio Pappano, will explore the history and music of key opera cities.Telecommunications就该改正，这才是明君。当卡尔从莫尼卡那里出售他们的遗产时，他们发现自己的钱在燃烧。与此同时，菲奥娜发誓放弃随机搭讪，专注于她的新公寓楼；lip则处理伴随着清醒而来的牺牲；弗兰克则从冰毒引起的阴霾中走出来，为几十年的堕落赎罪。赛季首映。