一座巨大的山脉构成了两国之间的天然边界。

A massive mountain ___range forms a natural border between the two countries.

我们能看到远处那座山脉的数座积雪覆盖的山峰。

We could see several snow-capped peaks of the mountain ___range in the distance.

这条徒步小径蜿蜒穿行于风景如画的山脉的整个长度。

The hiking trail winds through the entire length of the picturesque mountain ___range.