In a very distant place, there is a very ancient river.

在很遥远的地方，有一条非常古老的河。

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Ancient river channels and craters suggest that Mars once supported oceans of water.

远古的河道和环形山暗示了火星上曾有过水源。

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The ancient river channel can be divided into 5 parts vertically, in fining upwards tendency.

在垂向上，古河道自下而上分为5段，其粒径呈愈向上愈细的趋势。

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Below,the flowing river continued to uncover more and more levels of ancient rock.

VOA: special.2009.10.07

In two years of flooding, the Colorado River filled the ancient lake.

VOA: special.2009.08.12

The new specimens were found in ancient river deposits in Alberta, Canada.

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In the other direction, a wheelchair-accessible boardwalk heads 300m along the banks of the Pieman River to an ancient Huon pine tree.

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Boarding a vessel on the Nile is to peel back millennia and slow down to river speed as ancient temples, oxcarts and palm trees pass by, unaltered since Pharaohs ruled the roost.

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