They are working on a dried river bed.

他们在干涸的河床上工作。

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They bear a strong resemblance to river systems on Earth, and geologists think that they are dried-up beds of long-gone rivers.

它们与地球上的河流系统非常相似，地质学家认为它们是早已消失的河流留下的干涸的河床。

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His skin was covered in a mixture of oils and resins and bathed in a solution of Natron, a salt found in dried-up river beds in Egypt.

他的皮肤被涂上了一层油脂和松香制成的混合物，并浸泡在一种泡碱溶液里。这种泡碱是在埃及干涸的河床上发现的一种矿盐。

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In 1892 an ambitious irrigation engineer and hustler named Charles Robinson Rockwood came up with the first plan to harness the river's wealth, a canal that would funnel water into a dried-out riverbed, irrigating the surrounding desert.

FORBES: American Pyramids

On his release he began to campaign for a big dam on the Iato river, which roared down in the winter rains and dried up in the nine arid months.

ECONOMIST: Danilo Dolci