They dig out nests in the riverbed and lay their eggs.
它们在河床上挖巢产卵。
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。
This creates deep pools in the riverbed and slows the water down.
这就在河床上形成了深水池，使水流变慢。
They walked along a dry riverbed.
他们沿着干涸的河床走。
The workers rammed piles into a riverbed .
工人们把木桩打入河床内。
However the riverbed mesh is not an isolated infrastructure.
然而，河床网不是一个孤立的基础设施。
We usually play on the riverbed when the river dries up.
小河断流时，我们经常在河槽上玩耍。
16the parched Allier riverbed near Brassac-les-Mines, central France.
法国中部布拉萨·克莱米讷附近干枯的阿列河床。
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。
There are no glittering diamonds without the scouring of the riverbed;
没有河床的冲刷，就不会有钻石的璀璨；
The riverbed contained by the dike was deep and broad lined with iron-grey shingle.
被高堤嵌住的河床又宽又深，满盛着一川铁灰色的砾石。
The single-mast system also ensures that the riverbed suffers a minimum of disturbance.
单桅杆系统也保证了河床遭受了最小的干扰。
During the dry season, you can follow the rocky riverbed all the way down to some little houses.
在旱季，你可以沿着河床的石头一直走到有一些房子的地方。
We sit on the ground, looking into the distance of the wide riverbed and the night sky without stars.
我们席地而坐，极目宽阔的河床和没有星月的夜空。
Sandy deserts, impermanent lakes, and riverbed sediments provide plentiful material for dust storms in Iraq.
遍地黄沙的荒漠，干涸的河床与湖床中的沉积物——在伊拉克，这些沙尘源地的存在，为沙尘暴的发展壮大提供了极佳的条件。
"The encroachments on and around the riverbed, the sewage going directly into the river" are choking it, he said.
他说，“河床及其周边地区正在遭到侵蚀，下水道污物直接排入河中”，这条河都快窒息了。
The girls, 10 and 11 years old, were running barefoot along the riverbed, trailing their fathers, when they both stopped.
这两个女孩分别是10岁和11岁，他们跟着父亲，在河道上赤脚跑着，突然停了下来。
The imprint is well defined and deeply embedded in the sandstone riverbed, as if the tyrannosaur had walked there only last week.
这些足迹仍非常清晰，而且深陷在砂岩河床上，似乎这只霸王龙上个星期才刚走过一样。
Samburu man leads his cattle out of the village and across a swath of arid land toward a water well dug into a desiccated Kenyan riverbed.
一位桑布鲁男子赶着牛群走出村落，穿过一片干燥的土地，朝着在干燥河床上挖掘的一口水井进发。
The resulting silt raises the level of the Yangtze riverbed, not only reducing the life of the dam, but also worsening the risk of floods.
淤泥堆积抬高河床，不仅减少大坝使用寿命，而且增加洪水泛滥的可能性。
The result shows that the flow field and the process of riverbed erosion and deposition can be simulated qualitatively by this method.
数值计算结果表明，该模型在定性上能正确地模拟水流以及河床的冲刷、淤积过程。
A Samburu man leads his cattle out of the village and across a swath of arid land toward a water well dug into a desiccated Kenyan riverbed.
一位桑布鲁男子赶着牛群走出村落，穿过一片干燥的土地，朝着在干燥河床上挖掘的一口水井进发。
The tide of Qiantang river is controlled by its geographical location, shape of river, riverbed topographic feature, hydrology, climate etc.
钱塘江大潮的形成受地理位置、河口形状、河床地貌、水文、气候等因素综合影响。
The results show that the flow field and the process of riverbed erosion and deposition in mountain river can be simulated correctly by this method.
数值实验表明，该模型能正确地模拟山区河流复杂的水流以及河床的冲刷、淤积过程。
The plain part starts from Qingtong Gorge to Hekou town. It has stable and slow riverbed. On both sides are the famous Yinchuan plain and Hetao plain.
平原段(青铜峡至河口镇)，河床平缓，两岸为著名的银川平原和河套平原。
In the lower reaches, where the current slows, the natural accumulation of sediment in the riverbed has caused the river to change course often in the past.
在河流下游，由于流速变缓，泥沙(等沉淀物)自然而然地堆积在河床中，曾经造成黄河经常改道。
If it were possible to develop a turbine that did not need such a water-head to operate, and that could sit in the riverbed, then a dam would be unnecessary.
如果有可能制造出一种涡轮无需水的落差来运转，并且可以放置在河床上，那么就不再需要大坝了。
If it were possible to develop a turbine that did not need such a water-head to operate, and that could sit in the riverbed, then a dam would be unnecessary.
如果有可能制造出一种涡轮无需水的落差来运转，并且可以放置在河床上，那么就不再需要大坝了。
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