托福單詞riverbed什么意思-riverbed詞組短語_例句_同義詞

riverbed意思

n.河床

riverbed詞組短語

riverbed bedrock河床基巖

riverbed dynamics河床動力學

Riverbed evolution河床變動

Deepest Riverbed最深河床

Abandoned riverbed廢河床

riverbed leakance河床的漏泄電導

riverbed runway河床

raised riverbed抬高的河床

riverbed entrenchment河床下切

riverbed同義詞

n.

bed,bottom

riverbed例句

1.Scientists have dated sharp-edged flakes of stone found in the fine-grained sediments of a dry riverbed in the Afar region of Ethiopia to between 2.52 and 2.60 million years ago.

科學家們已經確定，在埃塞俄比亞阿法爾地區(qū)干燥河床的細顆粒沉積物中發(fā)現(xiàn)的具有鋒利邊緣的石片存在于252萬至260萬年前。

2.They dig out nests in the riverbed and lay their eggs.

它們在河床上挖巢產卵。

3.As a result of fluvial scouring and aggrading the riverbed,the alluvial layer is fluid-saturated porous medium.

由于河流沖刷和河床加積，沉積層多飽和多孔。

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