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There are some techniques that can be used to reverse a relationship if the flow of logic requires it. For instance, the higher-level module could expose a required interface which will be implemented by the lower-level module. That’s the Dependency Inversion Principle on the module level. One of the other possibilities is to introduce a mediator pattern.
，这一点在体育直播中也有详细论述
На шее Трампа заметили странное пятно во время выступления в Белом доме23:05
这一转变，具体体现在对下沉市场的数字化基建、对中小商户的运营赋能，以及以前沿技术弥合服务鸿沟三个维度上。