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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:　剧集讲述女主（Margarita Levieva饰）正与女儿在欧洲度假，此时CIA的出现迫使她面对自己隐藏已久的KGB身份。过去俄国进行秘密实验时令到一些KGB拥有特殊力量，而一连串与此能力有关的死亡事件发生令女主不能再躲避起来，但是对付这名凶徒的代价是她可能失去家人及新生活。2. Ignoring defense does too much harm.这个他，指的自然是何永强。Some timing operations on data no longer rely on external programs, but directly use the functions provided by the database itself.南柱赫、金泰梨有望主演tvN新剧《二十五 二十一》。该剧由郑志贤(《国王：永远的君主》)执导，权度恩(《请输入搜索词：WWW》)操刀剧本，讲述1998-2021年间的故事，1998年22岁和18岁的两位主人公相遇，到了1999年时两人开始互相伤害，2000年时两人开始互相依靠，直到2001年两人才开始一段恋情。