它们从山脉变成草原，从森林变成河流。

They change from mountains to grasslands, forests to rivers.

他们在草原上搭起了帐篷。

They set up a tent on the grassland.

这片广阔的草原让人心旷神怡。

This vast grassland is refreshing.

草原上的草非常茂盛。

The grass on the grassland is very lush.

我在草原上看到了一匹白马。

I saw a white horse on the grassland.