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State mode refers to allowing an object to change its behavior when its internal state changes. The object seems to have modified its class. Divide this sentence into two parts by commas. The first part means to encapsulate the state into a separate class and delegate the request to the current state object. When the internal state of the object changes, different behavior changes will be brought about. The second part is from the customer's point of view, the object used has completely different behaviors in different states. The object seems to be instantiated from different classes, but in fact this is the effect of using delegates.一柄锈迹斑驳的铁剑，一朵溷落蒙尘的兰花和一只翱翔天际的孤鹰，是铁剑、兰花、鹰三位人物个性的写照。铁剑因何而锈？只因铁剑主人心已死！兰花因何溷落？只因兰花已不在幽谷！只有孤鹰还在翱翔，攫取猎物As for why, look at the following development cases.经过半年多的辛苦拍摄，《笑傲江湖之东方不败》这部电影终于完工，现在陈启等人看的就是最终剪切好的版本。Or look at the 132nd floor method, the effect is the same那少年却明白他的意思，不禁哼了一声，道：这蠢货。该剧由企鹅影视出品，根据闻情解佩小说《妃上不可》改编，讲述了一个勇敢善良的将门千金和腹背受敌的年轻皇帝之间从一开始冤家相斗到相知相爱、困难中相守，并一起为国为民发奋图强、励精图治的甜美爱情故事。