您的代码获取它需要的图像描述符，然后将其添加到图像注册表，并使用键为每个图像描述符建立索引。

The idea is that your code obtains the image descriptors it needs and adds them to the image registry, indexing each one with a key.

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外键不仅具有标识记录的标识符，而且还具有标识表的一个类型。

The foreign key has not only an identifier to identify a record, but also a type to identify the table.

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正如在表节点描述符上所显示的，在表空间上有10个分区，且用于九个分区的极限键是625,000个。

As shown in the table node descriptor, there are 10 partitions in the table space, and the limit key for the ninth partition is 625,000.

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