Dependency Inversion Principle states that we should decouple high level modules from low level modules, introducing an abstraction layer between the high level classes and low level classes.
依赖倒置原则声明了我们应该将高层模块和低层模块解偶，在高层类和低层类之间引入一个抽象层。
I hope this series introducing the essential modules of the Spring framework has been useful to you.
我希望介绍Spring框架核心模块的这一系列对您有所帮助。
The main modules of the circuit was given, introducing an important program, modules were introduced.
给出了主要功能模块的电路图，介绍了重要程序模块。
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