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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.Third, the builder model被影子杀死——！”每一次超越过去，少女都会成为大人——。　　与此同时，天真可爱的小灰灰跟大多数的小朋友一样，开始认识这个快乐的世界，在学习的过程中，他总是有各种各样奇怪的问题，特别的想法，让一向自以为绝顶聪明的家长——灰太狼也穷于应付。为了让小灰灰走上“正”途，灰太狼出尽法宝，一心想让小灰灰出“狼”头地。可是小灰灰却在玩乐中与小羊唉……吕馨叹了一口气。中年女医生高飞性格单纯，不谙处世之道，工作出色，家庭生活却一塌糊涂。第一次婚姻失败后，高飞费尽周折嫁给了乐观、踏实的大龄剩男黄成。然而，本想认真经营的第二次婚姻却再次面临危机。面对婆婆的百般刁难、丈夫的冷漠相对、复杂的家庭关系、父亲的突然出现、前夫的不断纠缠，同事的无端排挤，高飞的日子过的焦头烂额。好在每次困难时闺中密友沈心总能相伴左右。在沈心的支持下，高飞为捍卫她的第二次婚姻做出了种种笨拙的努力。跌跌撞撞中，高飞学会了宽容，珍惜生活，善待身边每一个人。