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可见这回没白出来，也不枉他舍了媳妇在这陪着二人。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.12. Don't buy too many stocks, preferably not more than five. You don't have that much energy to defend them.很多事情都要考虑在内的。We have seen that combining an OrderPizza method with a factory method (that is, the two methods in FactoryPizzaStore) forms a framework. In addition, the factory method encapsulates the production knowledge into each creator subclass, which can also form a framework.Protecting the edge is never a thing that will only get honor. It is more about giving, taking risks and even life.