n.水槽；马槽；低谷；低潮

So she quickly emptied her jar into the trough. 她迅速地把水罐里的水统统倒进水槽。

This type of barrier is a combination of the pumping trough and the hydraulic ridge. 这类屏障是把抽水槽和水力分水岭结合在一起。

However, as a mother of two, she was soon out of the trough. 但是，作为两个孩子的母亲，她很快就走出了低谷。

But economists do not necessarily expect the trough in production to be long. 但是，经济学家并不一定认为生产低潮会持续很长时间。