壕沟

The troops were entrenched near the mountains.

部队在群山边筑起沟以防卫自己。

I clambered out of the trench.

我费力地沟。

Consisting of concentric circles of stone surrounded by a moat (called a "henge"), Stonehenge was constructed in several stages over thousands of years.

由圆石沟包围几圈巨大的同心圆石块组，巨石阵的建造持续了数千年时间。