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众人都笑起来。要是能一下看完，那该多好啊。一个韩裔加拿大家庭经营便利店的不幸遭遇。《权力的游戏》是一部中世纪史诗奇幻题材的电视连续剧，该剧以美国作家乔治·R·R·马丁的奇幻巨作《冰与火之歌》七部曲为基础改编创作。该剧主要讲述了围绕田家达饰演的蒋宇轩与海陆饰演的妹妹可心这一家人中发生的各种事件。剧中蒋宇轩与妹妹从小感情十分要好，万事都以妹妹为优先，保护妹妹不被他人欺负。蒋宇轩撮合自己的朋友追求妹妹希望妹妹能有一个好的归宿，同时也赶走妹妹身边不靠谱的男生，更是对与妹妹产生误会的道生（言承旭饰演）十分敌对。在自己的爱情和妹妹之间产生冲突的时候，毫不犹豫的选择妹妹，更让人十分感动。Class has only one instance. Q: How can we guarantee it? Answer: Private constructors are used to ensure that classes cannot be instantiated outside the class.One problem with the factory method pattern is that the creation of the class depends on the factory class, that is to say, if you want to expand the program, you must modify the factory class, which violates the closure principle. Therefore, from the design point of view, there are certain problems, how to solve them? We use the abstract factory mode to create multiple factory classes, so that once new functions need to be added, we can directly add new factory classes without modifying the previous code. Because the abstract factory is not very easy to understand, let's look at the diagram first, and then it is easier to understand with the code.