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忽必烈建元后,沿用前朝旧例频繁派中书宰执带相衔临时到地方负责行政或征伐事务。多数情况下该机构的性质仍然是朝廷的临时派出机构。世祖末成宗初,才逐渐演化为常设的、固定的地方最高机构。这一机构体现了( )
—Guess what? I happened to have met Mark at the party last week.
—If my memory serves me correctly, you two ________ each other for almost ten years.