The object Contact is the ActiveRecord object-relational mapping that the model provides.
对象Contact是模型所提供的ActiveRecord对象-关系映射。
Add a default mapping for type contact: default mapped to PC: adrbook.
添加联系簿默认类别映射:default映射到PC: adrbook。
Add a default mapping for type contact: default mapped to PC: adrbook.
添加联系簿默认类别映射:default映射到PC: adrbook。
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