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Let's understand such a problem first, If our front-end development needs are the needs given to us by the demand side, It is possible that a front-end developer will deal with multiple demanders, Therefore, it will keep in touch with multiple demand parties. Then in the program it means keeping references to multiple objects, The larger the program, There will be more and more objects, The relationship between them will become more and more complicated. Now if there is an intermediary (if it is our supervisor) to meet the needs of multiple demanders, Then the demander only needs to give all the requirements to our supervisor, who will assign tasks to us according to our workload in turn. In this way, our front-end development does not need to contact with multiple business parties, we only need to contact our supervisor (i.e. Intermediary), which weakens the coupling between objects.2006年初秋，滨州市、香港乔氏地产公司驻滨州市项目代表郑天京被人在住所谋杀，他的尸体当晚被埋进了工地垃圾堆中……安局长陆啸天命刑警支队重案组长刘英来率重案组成员姚晃、依蔓和飞飞赶到案发现场投入侦查工作。重案组严格对死者死亡时间保密，发现死者与龙心集团董事长张伟及其部属有密切联系。张伟出身黑社会团伙，掌控滨州市黑白两道……同时，被刘英杰逮捕的杀手大脚从服刑地新疆脱逃，潜回滨州市，被老大张伟窝藏起来。大脚仇视刘英杰，打算干掉刘英杰……重案组民警李晓和派出所民警联手捉拿大脚，大脚老奸巨滑溜掉。张伟得知大脚出外生事，将他训斥一顿，命他在密室上网，不准外出。It is a men's competition. There are two versions of its origin. One is that it originated in Britain and evolved from a children's game in Britain. It was then introduced into the United States by British immigrants and gradually became the national ball of the United States ". The other is that it originated in the United States.Country Name Death and Injury Total Death and Injury　　鬼子来了，英雄却老了，四面焦土，何以藏宝？Originated in the Swiss Alps, it is a winter sport that takes wooden or metal skateboards to slide and turn at high speed on special ice and snow routes. It is divided into two types: sled with rudder and sled without rudder.