The hills above the valley are bare rock.

河谷上面的山是光秃秃的岩石。

《柯林斯英汉双解大词典》

First to colonize the barren land are the lowly lichens, surviving on bare rock.

贫瘠的土地上首先长满了地衣这种低等植物，它们在裸露的岩石上生存。

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Lower slopes of mountains are blanketed in forest, while above treeline, the ground appears to be bare rock.

山岭低缓的斜坡上覆满森林，在林线之上地表显露出裸岩。

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The constant fires burned everything down to the bare rock base.

VOA: special.2009.07.20

Proud and free, Okello ended up on hard rock in the bare and barren Ngong Hills.

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In sun, rain or snow she was up there, digging down through the turf and the fibrous black peat until she hit bare rock.

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The helicopters were going back and forth, ferrying snow from the high peaks in the Alps down to naked ski slopes so that the World Cup ski racers would have something to shush on besides bare rock.

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