此时就出现了组合适配器工厂。

This is where the composed adapter factory comes in.

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然后，组合适配器工厂直接将实现委托给这些其他的提供程序。

Then the composed adapter factory simply delegates its implementation to these other providers.

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我们即将了解到，这个类的优势在于，导航器只需将我们所需要的模型类型的项目提供程序作为组合适配器工厂的一部分包括进来。

The advantage of this, as we will see later, is that our navigator only needs to include the item providers for the model types we are interested in as part of the composed adapter factory.

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