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如今试到半途，怎能就撂手呢？若说担心性命，有微臣的老管家在，皇上就是想走，也走不了呢。他咽了下口水，强抑心慌，推开左边的暗门，走进一个黑暗所在。原创TV动画「幕末替身传说」公开。In the factory method mode, the factory class and the specific product class have a parallel hierarchical structure, and there is a one-to-one correspondence between them.胡钧四下乱看，嘴里喃喃道：还是不妥。承接第一部剧情，一群食肉老鼠通过水管道再次来袭，恐怖鼠患围攻家园。The policy pattern defines a series of algorithms and encapsulates each algorithm so that they can be replaced with each other, and the changes in the algorithms will not affect the customers who use the algorithms. It is necessary to design an interface to provide a unified method for a series of implementation classes. Multiple implementation classes implement the interface, design an abstract class (optional, belonging to auxiliary class), and provide auxiliary functions. The diagram is as follows: