1、The valley of the Yellowstone River has beautifully coloured rocks and three large waterfalls.
石河 大峽谷有色彩艷麗的巖石和三個大瀑布。

2、The Yellowstone River is critical for irrigation for example.
例如，黃石河在灌溉方面發(fā)揮著關(guān)鍵的作用。

3、At the bottom you'll see Yellowstone River winding through the colorful canyon.
在峽谷底我們可看到黃石河穿梭在五彩繽紛的峽谷中。