As a happy iPhone user I am grateful that Apple took this position and tries to keep this platform clean and without needless duplication.

作为一个快乐的iphone用户，我很感激苹果能占据这个位置并努力保持平台干净，没有无必要的复制。

youdao

The standard MBeans convention would make the interfaces depend on the implementations and represents a needless duplication of the inheritance hierarchy for this system.

标准 MBean 的约定使得接口依赖于实现，而且代表这个系统的继承层次出现不必要的重复。

youdao