In this case we do not define an instance variable in the injectee, but an abstract method returning the required object. The method may be public or protected

在这个例子中，我们没有在被注入者中定义一个实例变量，而是定义了一个返回所需对象的抽象方法。

youdao

Abstract: Right, as the protected object of fault tortious liability, can't be taken as the foundation of this liability.

摘要权利仅能作为过错侵权责任的保护对象，而不能作为责任的发生基础。

youdao

To fix a violation of this rule, either make the constructor protected, or do not declare the type as abstract.

如果需要修复这个问题，可以声明这个构造函数为保护型，或者，声明这个类型不是一个抽象类型。

youdao