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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.有张三丰在前，张翠山再怎么发展，也不会太出彩。关于家庭生活的令人难忘的故事。一个脆弱的小男孩发现他的母亲被一个陌生的新女人赶出了家，他必须面对似乎和她一起搬进来的可怕的超自然力量。在一群朋友的除夕晚会上，一系列疯狂的活动揭露了秘密，伤心了，并导致了令人震惊的结局。同治三年（公元1864）太平天国作乱，福建省骠骑将军林文豪连年争战杀场，趁着回台空隙探望妻儿，不料竟撞见其妻宝霞因不耐长年忍受丈夫不在身边的孤独，决心与文豪多年好友朱士贵私奔，林文豪几经挣扎，决定放宝霞走，往后孤独一人带着女儿林玉环在战场上杀长毛军报效国家。七十年代，城市知青马杰（文章 饰）来到西北某农村插队，被村里漂亮种驴——黑六的叫声吸引。马杰嫌黑六不让他骑，某次工伤在诊所缝针时偷了麻醉剂打给黑六，队长大莲（岳红 饰）以为黑六生病，心急如焚。马杰奇迹般地“治愈”了黑六，赢得大莲和队里的信任，成为牲口饲养员。马杰一边喂驴，一边偷偷与村里的女青年彩凤（白静 饰）相恋。与此同时，马杰对黑六只配种不干活的特殊待遇愈发不满，并对大莲“驴比人值钱”的论调暗自气愤，发泄中竟打坏了黑六的“命根子”。无法配种也不能干活的黑六被马杰宰杀，却没曾想黑六的弟弟，毛驴黑七，从此与马杰不共戴天。人与驴的斗争愈演愈烈。