我们讨论了所支持的各种数据访问模式和基本使用场景，并给出了非常简单的示例和较为复杂的示例。

We have discussed the various data access patterns that are supported and the basic usage scenarios, and we have demonstrated examples ranging from very simple to somewhat complex.

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下面简要介绍这些模式的主要用途和典型的使用场景。

Now each of these patterns will be sketched to provide insight into their major purpose and typical use case scenarios.

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下面简要介绍这些模式的主要用途和典型的使用场景。

Now each of these patterns will be sketched to provide insight into their major purpose and typical use case scenarios.

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