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 dig out nests in the riverbed and lay their eggs.

它们在河床上挖巢产卵。

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

由于河流冲刷和河床加积，沉积层多饱和多孔。

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。

They were ramming piles into the riverbed.

他们夯木桩到河床内。

The soldiers billowed across the muddy riverbed.

士兵们翻腾过泥泞的河床。

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。

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。

Vonage was founded in 2001; Riverbed rolled out its first product in 2004.

Vonage成立于2001年；而Riverbed公司则是2004年才推出了自己的第一个产品。

He said he ran for three hours to get to the riverbed to look for his brother.

接过话题说，他说他跑了3个小时才到达河床，然后开始找他的兄弟。

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。

Particles of soil are deposited on the riverbed itself, making the river shallower.

土壤微粒沉积在自己的河床上，使河流变浅。

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。

We reached a dry riverbed and the car stopped. “They’re going to kill us, ” Tahir whispered.

正当我陷入无尽的自责和懊悔时，车驶到一处干涸的河床里突然停了下来，“他们要杀我们了”，塔赫尔在我耳边悄声说道，“完了，他们肯定打算在这儿杀死我们了！

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。

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。

However, situated low and deep inside the organic fabric of the neighborhood, it overlooks a riverbed at the back.

但它坐落在社区有机建筑里面的低层处，能眺望到后面的河床。

Then, once it is in place, it is partly flooded and allowed to sink to the riverbed around the breach, making a tight seal.

一旦到位，就向拱坝内灌水使它沉到裂口周围的河床上，形成了一道严密的围堰。

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。

Towers of salt and a riverbed colored by crystallized salt create an otherworldly landscape in Ethiopia’s Danakil Desert.

盐的山峰和经结晶盐着色过的河床构成了埃塞俄比亚的达纳基尔部落沙漠中的超俗脱尘的景观。

One account describes a terse meeting between American and Pakistani soldiers in a dry riverbed on the border of Waziristan.

有条记录描述了美国和巴基斯坦之间的一次简明会议。

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。

A man helps a moran, or young Samburu warrior, drive cattle toward a small borehole dug into a parched riverbed in Archer's Post.

一名男子正在帮助一位年轻的桑布鲁武士赶牛，年轻人在阿切站附近这块干燥的河床上凿了个洞，以取水为牛群解渴。

Basically it proposes a riverbed mesh that is extended and infiltrates through the entire downtown, as if it were a living organism.

首先它提出将河床网作为一个活的有机体扩展并渗透到整个市中心。