长城像链条一样随着山势的走向在中国北方蜿蜒曲折。

twists and turns along the hill-tops of mountain chains in northern China.

youdao

狭义的北方，指辽宁省辽河以东至内蒙古西境及陇西，即考古界称的“以燕山南北长城地带为重心的北方文化区。”

While the North in a narrow sense refers to the east from Liao He till the west of Inner Mongolia and Longxi, namely the "northern cultural region" called by the archaeologists.

youdao

明朝采取了一个新的策略通过沿中国北方边界建造长城来阻挡游牧的蒙古。

The Ming adopted a new strategy to keep the nomadic Mongols out by constructing walls along the northern border of China.

youdao