Roller mills as a kind of processing equipment which make power grinding with the theory of crushing on the material bedding can be widely used in power engineering.

辊式磨是一种应用料床粉磨原理对物料进行粉磨加工的设备，广泛地用于粉体工程领域。

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People in prehistoric times created paints by grinding materials such as plants and clay into power and then adding water.

史前的人们制造颜料是将植物和泥土等原料磨成粉末，然后加水。

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Smash operation plays an important role in metallic ore concentration plant and it consumes maximum power, especially grinding operation was even more evident.

粉碎作业在金属矿选矿厂占有重要位置，是耗电最大的作业，尤其磨矿作业更为突出。

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The power failure caused havoc, with whole cities grinding to a halt and transport and other services badly hit.

BBC: Aggreko in power talks with India

Some people have looked at the idea of grinding up peridotite and using it to soak up emissions from power stations, but the process turns out to be expensive, partly because of the costs of transporting all the rock.

ECONOMIST: Greenhouse gases