The tencha is then ground to a fine powder often in a stone mill.

“碾茶”用石磨研成精细的粉末就是抹茶了。

youdao

In the courtyard Nasreddin saw a stone mill. He began to push it around, faster and faster.

纳斯·雷丁在院子里看到一盘石磨，便开端推着石磨转，越转越快。

youdao

In the courtyard Nasreddin saw a stone mill. He began to push it around, faster and faster. When dawn came, he was sweating all over himself.

纳斯·雷丁在院子里看到一盘石磨，便开始推着石磨转，越转越快。当黎明来临时，他汗流浃背。

youdao

Their nuts are hand-ground in a stone mill to produce a nourishing oil.

BBC: In search of a lost Moroccan oasis

The technological leaps that interest Wilson from spear and skewer to fork and knife, say, or from pounding stone and grinding mill to food processor are, obviously, inextricable from the cultural leaps that moved Homo sapiens from cave to settlement, which is to say to agriculture and, with it, to concepts of wealth, property, and the kitchen.

NEWYORKER: A Fork of One��s Own

Although food cognoscenti love to talk about stone-ground cornmeal meaning cornmeal ground between stone wheels at a grist mill I can't really detect any difference in flavor from corn that is ground using more modern equipment.

NPR: Kernels of Truth About Cornmeal