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干燥河床的細顆粒沉積物中發現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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