He is grinding flour.

他正在磨面粉。

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Catalysts for chemical industry and other industries, fertilizer, animal feed, pigment, cosmetics, grinding flour, all kinds of washing chemicals and other particles.

化学工业和其它工业的催化剂、化肥、饲料、颜料、化妆品，磨面粉各种洗涤化学药品等颗粒。

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Windmills Another former staple9) of Dutch agricultural life, mills were originally used for all sorts of practical purposes such as grinding flour, sawing wood, or pumping water.

荷兰农业社会遗留下来的另一特色物品是风车。 风车最早是用于各种实用目的，如磨制面粉、锯木材或者抽水。

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The windmill was a Medieval European innovation and both wind and water mills were not just used for grinding flour but also fuilling cloth, making leather and driving bellows and trip-hammers.

FORBES: What Are Examples of Things in the "Common Knowledge" about History That Historians Almost Universally Consider Incorrect?