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"No one expected Venus to be the poisonous hell that it is, or Mars to have the river valleys that it does," he said.

“没有人能够预料到，金星是那样一个充满毒气的地狱，而火星表面却有河谷。”他说。

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These people exploited the landscape intensively, foraging on hill slopes for wild cereal grasses and nuts, while huntinggazelle and other game on grassy lowlands and in river valleys.

这些人集中地开发这片土地，在山坡上寻找野生的谷类植物和坚果，而在草木茂盛的低地和河谷里猎捕瞪羚和其他猎物。

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The bats fly to nearby river valleys to feed on night-flying insects.

VOA: special.2011.04.11

In doing so, it moved through many river valleys.

VOA: special.2009.01.05

Severe storms are likely Saturday and Sunday in the Mississippi River, Ohio River and Tennessee River valleys.

CNN: Mississippi governor urges caution as river crests

But soon enough, crumbling concrete gave way to thick forest, spread across a series of river valleys.

WSJ: Armenia's Ancient Monasteries

East of the River Adur, the downs run in three long plateaux, separated by stream and river valleys.

BBC: England��s ghostly South Downs Way