随着欧洲区的使用，现在数据可以在EC2内部存取，无需成本。

A large number of customers have stored data into the European region of Amazon S3. With the new European region this data can now be accessed with low latency from within EC2 at no cost.

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只有解锁位置的外部请求以及所有内部存取请求，才返回真正的存储器(19)内容。

Only external requests of unlocked locations, and all internal access requests, return the actual memory (19) contents.

youdao

一般来说，直接存取和遍历存取都需要知道内部节点的结构。

In general, both direct and traversal access require knowledge of the internal node structure.

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