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Each object has its corresponding state, and each state corresponds to some corresponding behaviors. If an object has multiple states, there will be many behaviors. Then the judgment of these states and the behavior completed according to the states will lead to multiple conditional statements, and if a new state is added, the existing code needs to be changed. This kind of design obviously violates the principle of opening and closing, and the state mode is used to solve such problems.乖乖女尹镰终于鼓起勇气向青梅竹马的宫风曜告白，却得到一个模棱两可的答复。是告白的时机不对？还是自己不够优秀？无论如何，暗恋宫风曜多年的她并不想放弃。然而这场未果的告白没过久，另一场突如其来的高调告白将尹镰原本平静的生活彻底打破……5. Focus Mode陈将军，你为寡人夺回了故地，寡人很是感谢。幸福的家庭是令人羡慕和相同的。而灿烂、温馨的笑容印在了妻子马小霜、丈夫陈专强以及女儿悦悦的脸上。他们有着令人赞叹、羡慕的三口之家，然而，天有不测风云，下岗的窘迫、丧夫的痛苦、婆婆的误解、家人的无助，顿时将马小霜原本所拥有的一切击得粉碎。面对自己与女儿今后的生活，她显得那么无奈、措手不及。总不是来为项羽送行的吧？那么尹旭的目的又是什么呢？似乎被越国算计已经成为一种习惯，刘邦心中忍不住地有些悸动。