gully

他把沟壑藏在夹克下面作为防护。

He hid the ___gully under his jacket for protection.

孩子们沿着干涸的小溪沟壑探险。

The kids explored the dry ___gully where the stream used to flow.

徒步旅行时，我们沿着一条由雨水冲刷形成的小峡谷前进。

During the hike, we followed a small ___gully carved by rainwater.