山沟的英文：
valley
gully
mountain region
ravine

参考例句：

torrent control works
山沟治理工程

They clambered up a narrow gully
他们爬上了一条狭窄的山沟。

valley是什么意思：
n. 山谷；流域；溪谷

Valley glaciers are confined to valleys in mountainous terrain.
山谷冰川只限于多山地带的山谷。

In spring, the valleys are ablaze with colour.
春天，山谷里春色绚烂。

Farmers worked the fertile valleys.
农民们在肥沃的山谷里耕种。

gully是什么意思：
n. 小峡谷,排水沟

In such areas small tributaries or gullies will not show
在这些地区，小的支流和冲沟显示不出来。

He took off his shoes and wade across the shallow gully.
他脱下鞋子涉过了浅水沟。

A few days afterwards a heavy wagon pass through the gully.
几天後一辆大篷车经过了这个小峡谷。

mountain是什么意思：
n. 山；山脉；大量

a chain of mountains/a mountain chain
连绵的山[山脉]

If the mountain will not come to Mahomet, Mahomet must go to the mountain.
如果山不走向穆罕默德，穆罕默德就必须自己走向山。

Snow covered the mountain. = The mountain was covered with snow.
白雪漫山