对于隐藏岩内生物来讲，答案就是-岩石里。

For a cryptoendolith, the answer is inside a rock.

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它是前寒武纪变质岩内一种重要的构造现象。

They are important structural features in the Precambrian metamorphic rocks.

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据估计，北美的碳酸盐岩油气藏有一半是在白云岩内。

It is estimated that about half of the carbonate oil and gas reservoirs in North America are in dolomite.

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