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The above is only a model of "Long En" bicycle, If you need to generate other types of bicycles, Other subclasses can be written. The most important advantage of factory mode is that some of the same methods can be implemented. We can write code in the parent class for these same methods. If we need to implement specific business logic, we can rewrite the parent class's methods in the subclass to implement our own business logic. In terms of professional terms, there are two points: First, weaken the coupling between objects and prevent code duplication. Instantiating a class in a method eliminates repetitive code. Second: Repetitive code can be written in the parent class. Subclasses inherit all member attributes and methods of the parent class. Subclasses only focus on implementing their own business logic.照例这种宴会不过是皇家昭示恩威的一种手段，没有人真来吃喝的，交际成了主要内容。Anyway, the smell is very bad. I feel that the worst smell I have ever smelled in my life is it, but it is all a small meaning. It took me a few minutes to feel sick and uncomfortable. The Vietnamese army's attack started again. From this onwards, it can also be said to be the most difficult period in the defense war of the whole 142 position. "Zhao Mingkai said.当然了。　　期盼着和平的国家，而成为了土耳基史上最年轻的将军。　　报社编辑单云与大公司副总经理伍德是大学同学，结婚后相亲相爱，幸福得让人羡慕，被同学、同事和朋友当成幸福婚姻的典范。唯一不足，是单云多次宫外孕，至今没有生育，好在伍德并不以为憾。单云陶醉在幸福生活之中，还在不断期待孕育成功，伍德却在帮助另一个女人和她的孩子。本剧讲述了美食家汉堡让十二位女生大快朵颐的故事！这是一个真实存在的店铺，每集都讲述了只有在这里才能吃到的独一无二的汉堡。无论是突然被男朋友甩了，还是对未来充满迷茫，吃过考究的美食家汉堡后，也能获得些继续向前的动力。这部美食喜剧，以短篇合集的形式，充分展现了美食家汉堡的魅力。