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Therefore, it is not necessarily good to attack with a heavy pile of life, and it is also good to have both offensive and defensive skills.SYN Flood巴蜀对于自己，就相当于江东二郡对于项羽一样，如果真的丢了……自己会不会像项羽那么坦然，或者说是无奈何呢？张良见到刘邦郁闷。大人说的是。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.他的智商和科学，不容侮辱，不容践踏。