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The policy mode is the packaging of the algorithm, which separates the responsibility of using the algorithm from the algorithm itself and delegates it to different objects. Policy patterns usually wrap a series of algorithms into a series of policy classes. To encapsulate the policy pattern in one sentence is to "encapsulate each algorithm into a different policy class so that they can be interchanged". The following is the structure diagram of the policy mode:The professional mode can be opened by drawing the pro button at the bottom of the camera interface不仅仅是喜欢 -- 萧全何谈如此？锦衣卫从未有过今日之盛。His eyes were red, his tears rolled down, his whole body trembled, and even his handcuffs and shackles were shaking. At this moment, he was like a child who had done something wrong, as if praying for the forgiveness of adults, but the law would give him the fairest judgment.Do you admire the old man in this article? Why?