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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.宋　影片的大部分时间，都有三方势力的互消互长，拉扯抗衡。一方是叶秋（郑伊健饰）。他曾经是江湖中的猛兽，然而8年狱中生活后，如今的他却只想办正道企业，振雄图大志，洗清背景。但似乎他的决心并不为人所理解。另一方是鬼仔（冯德伦饰）。他就像叶秋的过去一样，享受着叱咤江湖的威风而忘记回头，并视叶秋为威胁。而宋国明警官（方中信饰），则时刻都在等待一个时机，将两方一同擒下。男子一笑，也不再多说，这便要打开后院庭门：那我走了。Let's start with the simplest hot spring egg. Hot spring egg is not actually Sous Vide, because it does not need to go through the vacuum sealing process, and its name also well explains its manufacturing method, that is, let the egg soak in a hot spring ~澳大利亚一对年轻夫妇因为孩子的失踪陷入了无法想象的悲剧中Two, non normal major graduates to apply for teacher qualifications should be deployed according to the provincial education department to supplement pedagogy and psychology courses, and the provincial education department unified organization examination qualified.