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Look at the code of the database connection pool:从婴儿接生到脑部手术，这部纪录片系列带你来到纽约列诺克斯山医院，近距离呈现四名医生平日如何救死扶伤。——如果我还能叫他们爹娘的话。I was completely cold when I was not understood again and again. After the birth of the month, I chose to divorce.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.　　婚后的祝鸿才原形毕露，花天酒地，曼璐为保住名分，决定生一个孩子来留住祝鸿才，然而以往的多次堕胎使她有心无力，觉察到丈夫看上了妹妹曼桢后，曼璐策划出一条姐妹共伺一夫的毒计。懦弱的顾母默许了曼璐的做法，趁世钧回南京之际，祝鸿才强暴了曼桢。 　　　　郑树森、庞德、虞中和三股江湖帮派势力之间的恩怨情仇不可避免的交织在一起，最终将郑树森造就成一个青出于蓝的江湖大佬。这时日军开始进逼上海，对新四军等抗日组织进行追杀。在民族大义面前庞德、郑树森和他的兄弟们舍小我完成大我，投身于民族救亡的洪流中，用鲜血写就了一段历史传奇。