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Many Meng Xin are asking, and they also saw many 1-minute Gu Long Li Zhan bosses in the video. They also don't know how to take medicine with the highest efficiency, so they want to summarize it.酒就不用了，来一点饮料吧。可是那些看热闹的纨绔们，人还没到，就大声叫好，听得孙掌柜等人嘴角直抽——好什么好？什么还没看见就喊好，这不是起哄嘛。这场面其实挺悬殊的，除去穿着外，主要体现在文化程度上，这边坐的徐文长胡宗宪是什么人，而对面的飞龙国的人怕是连汉字都没认全。"I want to accompany you, my whole life! "It will be helpful to practice effectively and deliberately when there is no mentor, as long as you firmly remember the three F's.The 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.