The local limestone is so porous that all the rainwater immediately sinks below ground.

当地的石灰岩如此多孔以致所有的雨水很快渗到地下。

《柯林斯英汉双解大词典》

Florida actually gets a lot of sinkholes, that's because the ground across a lot of the state is made of limestone, a sedimentary rock.

佛罗里达实际上有很多这样的天坑，这是因为许多州的地面由石灰岩、沉积岩组成。

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Limestone provides a durable and contextual surface at the ground, increasing in transparency to the north toward the entrance.

在一楼，石灰石提供了坚固的外表，增强了朝向北部入口的透明性。

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Builders dug deep underground to extract limestone to build Paris above ground.

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Surrounded by red limestone cliffs, the water comes from the ground and is so clean you can drink it.

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