Otherwise, it would be time-consuming to map each dataentry from one sourcedata system to another.
否则，将每个数据条目从一个源数据系统映射到另一个源数据系统将非常耗时。
2
Each dataentry point is a possible source of duplication for customer names or for multiple customers who may live at the same location.
每个数据输入点都是可能的客户名称重复源，或者可能会存在生活于同一地区的多个客户。
3
Even the lonely data-entry clerk must be considered an untrustworthy source, even though he may unintentionally send our application some troublesome data.