troughs
海槽
例句
The boat rolled heavily in the troughs between the waves.
小船在海浪间的波谷中剧烈地摇晃着。
《柯林斯英汉双解大词典》
There have been peaks and troughs in the long-term trend of unemployment.
长期以来失业率一直时起时伏。
《牛津词典》
Horse feed and water troughs should be relocated to areas away from where bats feed or roost.
应改换马的饲料槽和饮水槽位置，使它们远离蝙蝠进食或栖息的地方。
