正如我们在专题的第一篇文章中讨论过的，越来越多的数据正在结构化——允许第三方开发者交叉连接和利用这些数据。

And as we discussed in the first post in this series, much of that data is structured - allowing it to be inter-connected and re-used by third parties.

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Oracle(+)外连接和交叉连接语法被直接映射到DB 2数据库产品。

The Oracle (+) outer and cross join syntax is directly mapped to the DB2 database product.

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这里，我们提出了为存储、检索和交叉引用有关鸟类大脑连接的神经科学信息而开发的第一个数据库。

Here we present the first database developed for storing, retrieving and cross-referencing neuroscience information about the connectivity of the avian brain.

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