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101. X.X.195Factory 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.但是我希望以后能在最高的山巅看到你。红椒忙问道：我娘没事吧？郑老太太道：你娘没事，就是见了香荽难过，哭了一会，怕动了胎气，你大姐和香荽陪她歇息去了。Bicycle高易看到眼前的景象，不禁大为震撼，周大靠过来说道：似乎……我们给大王准备的惊喜似乎不过啊。Event is a procedural database object called by MySQL at the corresponding time. An event can be called once or started periodically. It is managed by a specific thread, which is also called "event scheduler".