元代是蒙古族建立的统一大帝国，其统治阶层是由蒙古族为首的多民族贵族的联合体组成。
The unified giant empire, Yuan Dynasty was built by Mongolian nationality, in which the ruling class was composed of aristocrats from different nation alities.
到了十三世纪中期，盘大的蒙古帝国占据了亚洲的大部分。
By the middle of the thirteenth century the huge Mongol empire had spread across most of Asia.
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