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RB1, …Visitor pattern decouples the data structure from the operations acting on the structure, making the operation set relatively free to evolve. Visitor pattern is suitable for systems with relatively stable data structure and easy change of algorithm. Because visitor mode makes it easy to increase algorithm operation. If system data structure objects are easy to change and new data objects are often added, visitor mode is not suitable. The advantage of visitor mode is that it is easy to add operations, because adding operations means adding new visitors. Visitor mode centralizes the relevant behaviors into one visitor object, and its changes do not affect the system data structure. Its disadvantage is that it is difficult to add new data structures. -From EncyclopediaHowever, for Oppo, which is good at marketing,Spectrum Originals和派拉蒙电视网已确定10集悬疑新剧《失乐园》(Paradise Lost，暂译。原名《地狱天堂》)的主要演员阵容为乔什·哈奈特、布里吉特·瑞根等。这部悬疑剧由Rodes Fishburne(《黑金血泪》)创作并编剧，讲述一位精神病学家(瑞根饰)和她的家人从加州搬到她丈夫(哈奈特饰)在密西西比州的家乡，却发现了一些可耻的秘密，这些秘密不可逆转地改变了每个人的生活。