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The number of casualties in various countries in World War II was 3,000,000 in Japan.这也没多远，都到家门口了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.Note: The singleton methods used in Android source code include: InputMethodManager, AccessibilityManager, etc. all use this singleton mode.僵尸危机爆发，一对姐妹和两个年轻人上了一条船，希望借此逃生，但末日灾难下，奇葩的人也总能制造各种笑料...桓楚虽然撤退了，但是吴中一带留下了西楚国残余和隐藏实力照样会存在，这些事情就要交给飞影去办了，然后在一一清除。