动态服务选择——选择调用多个具有相同接口的组件中的哪一个。

Dynamic service selection - Chooses which of multiple components with the same interface to invoke.

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然后存储卡就可以选择扩展，并且业务组件实现可以用于相同的范围。

Then the extension can be picked up by the registry, and the business component implementation is available in the same scope.

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我们也可以为组件和导入使用不同的接口，但本文为了简单起见，选择了使用相同的接口。

We could also have used different interfaces for the component and the import — but for simplicity in this article, we have opted to make use of the same interface.

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