许多需求管理工具为每一个需求都保持了历史记录，但是并不能实现版本化。
Most requirements management tools maintain a history of each requirement, but they do not do versioning.
这一历史记录表明，信贷需求的匮乏可能会延续下去。
The historical record suggests that the lack of demand for credit is likely to persist.
当业务需求或技术更改时，这些历史记录可以帮助确定原来的决策，并有助于指导新决策。
When business requirements or technology changes, this history will help position the original decision and help guide new decisions.
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