如果不存在内部技术，或者需要使用人口统计学或营销详细信息对数据进行其他充实操作，通常会将所收集的数据发送到外部企业进行此清理工作。
If in-house technology does not exist or additional enrichment of data with demographic or marketing detail is desired, collected data is often sent to outside firms for this cleansing.
如果不存在内部技术，或者需要使用人口统计学或营销详细信息对数据进行其他充实操作，通常会将所收集的数据发送到外部企业进行此清理工作。
If in-house technology does not exist or additional enrichment of data with demographic or marketing detail is desired, collected data is often sent to outside firms for this cleansing.
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