So each time the EDLEVEL column value changes, the report breaks and the specified compute operation MAX is performed on the column SALARY.

所以每次当EDLEVEL列值改变时，报表将中断并对列salary执行指定的计算操作MAX。

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Begins an asynchronous operation to open a communication object within a specified interval of time.

开始一个异步操作以在指定时间间隔内打开通信对象。

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When overridden in a derived class, begins an asynchronous operation to reply to the request associated with the current context within a specified interval of time.

在派生类中重写时，开始进行异步操作，以在指定时间间隔内答复与当前上下文关联的请求。

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