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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.本剧分集讲述十个不同的故事，从亲情、爱情、友情的不同角度切入生活，通过司机李南来感受城市里每天都在发生，但总会被快速生活忽略的细小情感。用故事来温暖一座城市，温暖城市里平淡而忙碌的人们。Not willing to speak, speaking significantly reduced and finally stopped completely;-* on behalf of SPTD Cleaner SPTD-Cleaner.exe Same as SPTD-Cleaner.exe张基龙饰演警队出身的警卫蔡道振一角，他积极向上、充满正义感。新剧《我的爱蝴蝶夫人》讲述了知名影星出身的新媳妇南蝴蝶（廉晶雅饰）嫁入婆家后，经受波折后最终领悟到家人的重要性与人生意义的内容。《经典传奇》借助《传奇故事》的经验，同时又是一档大型化的历史人文故事节目。继承《传奇故事》的人性化讲述，同时力求新的突破。内容将具有《传奇故事》“加”美国《探索》纪实的新鲜风格。节目最大的亮点还是在于选题的“升级”，选题集中在重大历史问题，时代人物，动人心魄的政治军事斗争，离奇事件。选题在“传奇性”的基础上，还具有鲜明的“经典性”、“热点性”、“阶段火爆性”的特点。