就你的设计而言，你希望能提出一些关键的抽象，然后其他的代码只要负责和这些抽象，而非具体实现进行互相作用。

For your design you want to come up with key abstractions, and then you want to have your other code just interact with those abstractions, not with the specific implementations.

youdao

除了作为美术品更改管理流程的关键元素之外，这些实现细节还可以在您构建其他类型的具体解决方案时提供帮助。

In addition to being critical elements of the artwork change management process, these implementation details can also be useful to you when building other types of case-based solutions.

youdao

因为新的click方法重写了Button的具体实现，必须加上override关键字。

Since the new click method overrides Button's concrete implementation, the override keyword is required.

youdao