This ID is used in the calls that extract data from the library.
此ID用于从库中提取数据的调用。
Similar to returning matches, we can also extract data from each match.
类似于返回匹配项，我们还可以从每个匹配项中提取数据。
It is tricky to extract data from it or manipulate it for any other purpose.
很难从中提取数据或将数据用作其他用途。
Naturally, the same process applies to jobs that extract data from a single data source.
自然，这个过程也适用于从单个数据源提取数据的作业。
Naturally, the same process applies to jobs that extract data from a single data source.
自然，这个过程也适用于从单个数据源提取数据的作业。
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