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这些年他一直都在暗中苦练剑术，他认为自己不会再败于尹旭剑下。See? It's in town.Factory Pattern: Factory Pattern is a frequently used pattern. Classes implemented according to Factory Pattern can generate instances of one of a group of classes according to the provided data. Usually, this group of classes has a common abstract parent class and implements the same methods, but these methods perform different operations for different data. First of all, we need to define a base class. Subclasses of this class implement methods in the base class through different methods. Then you need to define a factory class that can generate different subclass instances according to conditions. After getting an instance of a subclass, developers can call methods in the base class regardless of which subclass instance is returned.妻子儿女，可都是住在北城的。又想她前番虽然嗤笑了他，却也是意有所指，如今他不再愚孝，一味顺从母亲，而是时常劝导她，竟然收效显著。202. X.X.158