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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.恭送大王。CalculateBouns functions are likely to get bigger and bigger, such as when increasing the D level, and lack flexibility.黑江陆（24岁）是位于萧条商业街中的蔬菜水果店“八百吉”角落的配送公司“Elephot Express”的快递员。“卖东西的人为什么要放弃呢？”“买东西的人为什么买了那个？”一边考虑着这些事情，一边今天也乘坐着小型卡车，每天运送着被买卖的东西。想要放弃梦想的人和在梦的开始的人、选择和所爱之人分手的人，有着今后可能会发生的美好相遇的预感…今天谁放弃的东西，明天也许会成为别人的宝物。在这片小小的陆地上，连接着奇迹的某个地方　　版本二燕南天已经跃过去，抱住了小鱼儿，一脸不可置信。II. Harm of CSRF Attack