It has no effect on this data extraction operation.
它不会对此数据提取操作造成影响。
We introduce the method of data extraction by means of an example.
我们用示例的方式来介绍数据抽取的方法。
Both applications, however, use the same set of data extraction utilities.
但是，两个程序都使用相同系列的数据提取工具。
If we were only performing the data extraction once, we would now be done.
如果我们只执行一次数据抽取，我们现在已经完成了。
If we were only performing the data extraction once, we would now be done.
如果我们只执行一次数据抽取，我们现在已经完成了。
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