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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.可是鱼与熊掌难以兼得，有时候必须要做出取舍。下次再捣乱的时候，多动脑子想想。陈老爷觉得自己腿脚有些哆嗦，头上大汗淋漓。After withdrawing from the Red Mansions Dream League, Gu Xiqian did not withdraw from the network in the first place, but ordered an energy card for him under the urging of the mecha Zhinao, which climbed out of the cockpit. Yes...