Guides explain that it did not result from the action of water and streams like other limestone caves.

VOA: special.2009.12.07

You bring iron ore from one part of the planet, carbon, limestone, you put it into this reactor and you ship this all over the world.

你得到钢铁从地球的一个地方，还有碳，石灰岩，将它们放入这个反应器,你将它运送到世界各地。

麻省理工公开课 - 固态化学导论课程节选

This is the calcination of limestone.

石灰石的烧结，在900度烧结。

麻省理工公开课 - 固态化学导论课程节选

The Portland Cement Association says the gas from the limestone is reabsorbed as concrete ages.

VOA: special.2009.12.01

Carbon dioxide is released in cement manufacturing when fuel is burned and limestone is heated.

VOA: special.2009.12.01

The walls were made of local limestone and bricks of sun-dried mud called adobe.

VOA: special.2010.04.26

The action of oil and natural gas created hydrogen sulfide in the limestone.

VOA: special.2009.12.07

a small amount of fertilizer and dolomite, a powder-like substance made from limestone.

VOA: special.2011.06.14

And it should be treated with limestone if the soil is acidic.

VOA: special.2009.07.07

The limestone developed about two hundred fifty million years ago.

VOA: special.2009.12.07

The surface is made of brick and limestone.

VOA: special.2009.12.13

There are many levels of granite, schist,limestone,and sandstone.

VOA: special.2009.10.07