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绿箭侠第三季背景讲述的是拥有上亿身价的Oliver Queen遭遇严重的游船事故。在失踪并宣布死亡5年后，被发现生还。当他重回大都市，受到了家人和朋友的热烈欢迎，但他们也感觉他和五年前不同。被《格雷姆》威胁生活的人类，由于《猎人》的活跃，守护着和平的世界。Visitor. Visit (this);? Generally speaking, design patterns are divided into three categories:这部电影由五个短片组成。Putham Pudhu Kaalai的五部短片讲述了希望、爱情和新冠疫情的新开端。Factory Pattern: Factory Pattern is a frequently used pattern. Classes implemented according to Factory Pattern can generate instances of one of a group of classes according to the provided data. Usually, this group of classes has a common abstract parent class and implements the same methods, but these methods perform different operations for different data. First of all, we need to define a base class. Subclasses of this class implement methods in the base class through different methods. Then you need to define a factory class that can generate different subclass instances according to conditions. After getting an instance of a subclass, developers can call methods in the base class regardless of which subclass instance is returned.