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.

youdao

长城是中华文明的象征，它的主要作用是为了抵御北方的游牧民族，是一项中国历朝历代都必须修建和维护的工程。

The Great Wall is a symbol of Chinese civilization, its main role is to resist the nomads in the north, China is an ancient dynasties must build and maintain the project.

youdao

长城是中华文明的象征，它的主要作用是为了抵御北方的游牧民族，是一项中国历朝历代都必须修建和维护的工程。

The Great Wall is a symbol of Chinese civilization, its main role is to resist the nomads in the north, China is an ancient dynasties must build and maintain the project.

youdao