河床的英文：
riverbed

An extremely fast - moving part of a river,caused by a steep descent in the riverbed.Often used in the plural.
急流，湍滩由于河床倾斜下降而形成的流动极快的河流的一部分，常用复数

a youthful streambed.
幼年期的河床

The river channel is deepening.
河床正在加深。

Ram piles into the river bed
把桩打入河床

estuary channel process
河口河床演变

Ram piles into a river Bed
把桩打入河床内

The brook warbled over its rocky bed.
小溪潺潺流过多石的河床。

The soldiers billowed across the muddy riverbed.
士兵们翻腾过泥泞的河床。

We shall have to widen out the river bed to avoid flooding.
我们将加宽河床以防洪水。

It's so long since it rained that the river-bed is dry.
很久没有下雨了，河床都已干涸。

The soldiers billowed across the muddy riverbed.
士兵们翻腾过泥泞的河床。

The riverbed is silted up, so there's no outlet for the floodwater.
河道淤塞，洪水无出路。

Archaeologists excavated fossilized dinosaur tracks from the riverBed
考古学家从河床中挖掘出恐龙的足迹化石。

It's so long since it rained that the river-bed is dry.
很久没有下雨了，河床都已干涸。

Sediment deposited by flowing water,as in a riverbed,flood plain,or delta.
冲积层河床、洪水淹没的平原或三角洲中的流水淤积所产生的沉积层