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 best place to see this collection is in a converted limestone mine 60 meters beneath the western Pennsylvania countryside.

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Usually this layer is a soluble carbonate rock, such as limestone or its purer form, chalk.

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This gorge wriggles through the Picos for 11km, with limestone cliffs and mountain slopes rising up to 1, 500m overhead.

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