例如，可以扩展这个接口来提供您应用程序用来验证用户身份的一个关键文件的内容。

For example, you can extend the interface to provide the contents of a key file that your application USES to authenticate users.

youdao

与接口一样，扩展点定义了用户与服务提供者之间的契约。

Like an interface, an extension point defines a contract between the user and the service provider.

youdao

准备好所需依赖关系的扩展点后，必须确定在何处集成插件和用户接口。

With the extension points for the required dependencies available, you have to decide where your plug-in integrates with the user interface.

youdao