Contained within the rock strata is evidence that the region was intensely dry 15,000 years ago.

岩层中的证据表明该地区在15,000 年前曾经非常干旱。

《柯林斯英汉双解大词典》

Over millions of years, groundwater left deposits of a mineral called calcite, on the rock within Devil's Hole.

在数百万年的时间里，地下水在魔鬼洞内的岩石上留下了一种叫做方解石的矿物质沉积物。

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The fact of the matter is that rock and roll, which was invented within the lifetime of many of us.

事实上，摇滚流行乐是在我们许多人的有生之年发明的。

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The action of wind and water can form cave openings like natural rooms within the rock.

VOA: special.2009.07.20

And the fact of the matter is that rock and roll, which was invented within the lifetime of many of us.

事实上，我们很多人，见证了摇滚的诞生和发展。

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Then,within the last twenty million years, movements in the earth pushed the rock upward, forming the Guadalupe Mountains.

VOA: special.2009.12.07

At Goliad the uranium ore is located just 400 feet deep within the same rock as a groundwater reservoir that ranchers tap for drinking water, both for themselves and their livestock.

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When the ocean plates sink deep enough, portions are melted by the intense heat generated within the mantle, turning the solid rock into molten magma.

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The air exiting the cave would be cooled by the thermal mass of the surrounding rock to within a degree or two of the yearly average temperature.

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