trough valley

基本解释

There is a valley between two mountains and there is a trough between two waves.
两山之间有一谷，西波之间有一伏。
David Corbitt, president of the railroad, said there was no way a car could get down into the deep valley, locally known as the Trough.
铁路公司的董事长大卫·科比特说，汽车是不可能去到河谷谷底的，谷底深处被当地人称之为“大沟槽”。
In combination with exploration and development of gas field, the methods of distinguishing ancient valley trough is proposed after analysis of forming condition of ancient valley trough.
本文结合气田勘探开发实践，分析了古沟槽形成条件，提出了古沟槽判识方法。