山势

shān shì dǒu qiào de shān gǔ

山势陡峭的山谷

a steep-sided valley

shān shì xiàng dōng xià jiàng zhì guǎng kuò píng tǎn de gāo yuán

山势向东下降至广阔平坦的高原。

The mountains fall to the east to the flat expanse of the plateau.