英英释义
riverbed [ 'rivəbed ]
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n.
a channel occupied (or formerly occupied) by a river
同义词： river bottom
以上来源于: WordNet
柯林斯英汉双解大词典
riverbed /ˈrɪvəbɛd/ (also river-bed)
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1.
N-COUNT A riverbed is the ground which a river flows over. 河床
双语例句原声例句权威例句
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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.
科学家们已经确定，在埃塞俄比亚阿法尔地区干燥河床的细颗粒沉积物中发现的具有锋利边缘的石片存在于252万至260万年前。
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They dig out nests in the riverbed and lay their eggs.
它们在河床上挖巢产卵。
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