Add and delete relationships between entities.
在实体间添加以及删除关系。
Create or Delete Relationships Between Work Items.
创建或删除工作项之间的关系。
When you redesign tables, it is often necessary to delete relationships and then recreate them after your new design is complete.
当重新设计资料表时，通常会需要删除关联性，然后在新的设计完成之后重新建立关联性。
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