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The code for creating the object is encapsulated and the specific factory class is instantiated, thus achieving the purpose of encapsulation and instantiation. Encapsulating the code that creates the object in one place can also achieve the purpose of reuse and is more convenient for later maintenance. This also means that when the customer instantiates the object, he will only rely on the interface and not on the specific implementation. Help us to better achieve interface programming rather than implementation, making the code more flexible to cope with future extensions.　　·企鹅的舞蹈动作是从当代的节奏踢踏舞王赛文·格洛文的动作中“复制”下来的。发出怒吼，峨眉派立派近百年，何曾受过这等侮辱？倚天剑化作一道寒芒，斩向张无忌。他啪地一声将折子丢在御案上，对下面朝臣怒道：张家小闺女被人掳掠，这事朕怎不知道？大臣们面面相觑，就算不知内情的人，也为皇帝这无名火叫屈：一个犯官家眷出事，谁脑子坏了，才会为这点子小事来禀告皇帝。Sub. Operation ();李sir（李修贤饰）是一名香港警察，为人公平正直。黑社会老大文叔（许绍雄饰）金盆洗手，退出了江湖，而接手的凯明却急于冒进，干了许多违法的事。李sir为了维护正义，开始追查凯明……《设得兰谜案》第四季已获得预定，依旧由Douglas Henshall主演，预计于2018年播出。第四季由David Kane担任主要编剧，将会延续第三季的模式，用六集篇幅讲述一个完整的案件。