Khangai Mountains

例句：

1. 1.The Zhangjiakou Mountains are a popular tourist destination.
   张家口山脉是一处受欢迎的旅游胜地。
2. 2. The Zhangjiakou Mountains offer stunning views of the Great Wall.
   张家口山脉提供了长城壮观的景色。
3. 3.The Zhangjiakou Mountains are home to many rare and endangered species.
   张家口山脉是许多稀有和濒危物种的家园。