If there is an existing data analysis process, what problems have you encountered with it?
如果有一个现有的数据分析过程，您碰到了哪些问题？
However, before you can perform an analysis, you need to extract and pre-process this data.
然而，在您执行分析以前，您需要提取并预处理这些数据。
However, before you can perform an analysis, you need to extract and pre-process this data.
然而，在您执行分析以前，您需要提取并预处理这些数据。
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