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We can see the above code; Player-to-player coupling code has been removed, However, all logical operations are put into the intermediary object for processing. Any operation of a certain player does not need to traverse to notify other players, but only needs to send a message to the intermediary. The intermediary processes the message after receiving it, and after processing the message, the processing result will be fed back to other player objects. The intermediary mode is used to remove the coupling code between objects. Make the program more flexible.? --------------------? ? ? END? ? --------------------------------向远（宋茜饰）和叶骞泽（欧豪饰）青梅竹马相伴成长，高中时因故分隔两地后，叶骞泽在广州遇到了从小被寄托到父亲叶秉林家（丁勇岱饰）长大的董灵（孙铱饰），随后阳光温暖的叶家二儿子叶昀（夏宁骏饰）也被接到父亲家一起生活。骤然增大的差异感并没有打倒向远和叶骞泽，他们在成长的道路上追求独立、各自努力，在广州相遇后两人甜蜜相恋的同时不断追求更好的自己，是一部年轻人拼搏向上、励志蜕变的成长史。(a) Without obtaining the corresponding qualifications, engaged in fire fighting technical service activities without authorization;In this example of abstract factory, there are two specific tables (user and dept) and two processing methods (SQL and access). According to the processing method, it is divided into two factories. Each factory has two abstract table processing, and each table processing is an abstract.(1) Special Hardware