依赖性倒置原则的基本思想就是对象应该依赖于抽象而不是实现。
The basic idea behind dependency inversion is that objects should be dependent upon abstractions and not upon implementations.
依赖性倒置原则被证明是编写可维护和可测试的高质量代码的必要条件。
The Dependency Inversion Principle has proved essential for writing high-quality, maintainable, and therefore testable code.
开发人员所赞同的一点是：编写良好的代码易于维护，依赖性倒置原则是进行可维护性设计的可靠方法。
One thing developers have come to agree on is that well-written code is maintainable, and the Dependency Inversion Principle is a sure way to design for maintainability.
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