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即便如此，是否成功他们还是不知道，只能尽力而为了，如果不成功就只能够战死沙场，马革裹尸了。/questionThe fundamental reason for using design patterns is to adapt to changes, improve code reuse rate, and make software more maintainable and scalable. In addition, the following principles should be followed when designing: single responsibility principle, open and closed principle, Richter substitution principle, dependency inversion principle, interface isolation principle, composite reuse principle and Dimit principle. Each design principle is described below.唐伯虎，江南第一才子，唐家霸王枪当代传人。简介：1942年，一群毫无经验的平民百姓，自愿参军受训，成为美军最新的一个团——空降部队。中尉索博魔鬼般的训练使他们吃尽了苦头，然而他们也成为了美军最精锐的部队。终于在1944年6月5日登上了飞机，奔赴法国“诺曼底”。Explain that in the OrderPizza method, we do a lot of things, including calling the CreatePizza method to generate a desired pizza, and then doing a series of operations on the pizza. The key point is that Pizza is defined as an abstract class, which means that in the OrderPizza method we don't care what type this Pizza is at runtime, in other words, this is decoupling. The coupling between PizzaStore and Pizza is uncoupled.