This makes objects very clean and reusable, and if dependencies are declared in terms of interfaces instead of specific classes, it also makes them very easy to unit test.

这使得对象非常简洁，具有可用性。如果依赖是通过接口声明而非确定的类，同样可以使得相关对象非常易于进行单元测试。

youdao

This notifies the validation framework that any unit declared by this package should be validated by this domain validator.

这将会通知该包所声明的确认框架应该由域确认器来确认。

youdao

They are not visible to procedures or functions declared within the same unit.

他们是不可见的程序或函数在同一单位申报。

youdao

For instance, there would be a merger: in the name of rationalization, the KM program would be declared a success and the leadership unit of the KM program would be gutted.

FORBES: Time For KM To Manage Knowledge About Management?