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The difference between them is that each policy class in the policy mode is equal and parallel, and there is no connection between them. Therefore, customers must be familiar with the functions of these policy classes so that customers can actively switch algorithms at any time. However, in the state mode, the behavior corresponding to the state and the state has long been encapsulated, and the switching between states has long been stipulated to be completed. The "change of behavior" occurs within the state mode. For customers, they do not need to know these details. This is what state patterns do《京华春梦》道尽豪门的恩怨情仇，繁华背后的虚幻，一名弱质女子如何面对封建家庭的无情压逼与冲激？　　金家为北京大户，富甲一方，可惜金家五位公子不事生产，只爱吃喝玩乐，整个家庭只靠老父金鹏独力支撑。四子金振西颇有才华，且英俊潇洒，可惜习染纫绔子弟的浮夸，一贯……也就是说西楚国和齐国完全胶着在一起。几番周旋苦战后，他们摆脱了敌人，终于逃出暗河。随着Montana的名声越来越响，少年成名的她面对蜂拥而至的各种诱惑不知所措。在父亲的建议下，回到故乡小镇，重新体会成名之前的平凡生活。她是否能明白自己真正想要的东西，清楚了未来的方向……Friendly reminder: The above methods are risky, please use them carefully, and please back up important data during operation.沈悯芮却说道：你有这种感觉，说明你有品鉴的慧根，更说明这书法的水平。