设置了四个字段来标识记录的状况(status)、日期、状态(state)和内容类型。

Four fields were set up to identify the status, date, state, and content type of the record. Following is the portion of the agent that flagged the content.

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外键不仅具有标识记录的标识符，而且还具有标识表的一个类型。

The foreign key has not only an identifier to identify a record, but also a type to identify the table.

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使用load方法并传递需要加载的类类型以及记录的标识符值。

You use the load method and pass it the class type you want to load, as well as the identity value for the entry you want.

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