北方民族在创造中华文明中做出重大贡献。
Above all, the northern minorities made great contribution to Chinese civilization.
蒙古族是我国北方的一个古老民族。
The Mongolian nationality is north part of our country ancient nationality.
蒙古族是北方一个古老而伟大的民族，有着悠久历史、灿烂文化。
Mongolia is an old and the great nation of a long history and splendid culture.
明长城的修筑是为了抵御北方游牧民族的入侵。
It was built to ward off the invasion of nomads from the north.
明长城的修筑是为了抵御北方游牧民族的入侵。
It was built to ward off the invasion of nomads from the north.
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