However, there are some problems at the process of developing ETL system. One of the most typical problems is the confusing management of metadata.
然而，在目前开发etl系统的过程中，存在着一些问题，其中最典型的就是元数据管理混乱的问题。
However, there are some problems at the process of developing ETL system. One of the most typical problems is the confusing management of metadata.
然而，在目前开发etl系统的过程中，存在着一些问题，其中最典型的就是元数据管理混乱的问题。
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