trough valley

例句：

1. 1.The trough valley is a popular spot for hiking and picnicking.
   这个沟谷是徒步和野餐的热门地点。
2. 2.The valley was filled with the sound of rushing water.
   山谷里回荡着奔流的水声。
3. 3.The trough valley was surrounded by lush forests and rolling hills.
   这个沟谷被郁郁葱葱的森林和起伏的山丘所环绕。