名词
中文翻译：大石磨
同义词：
['stone mill', 'stone grinder例句：1. The farmer uses a quern to grind the grains for his bread.（这位农民用石磨来磨谷物做面包。）']
例句：
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1. The farmer uses a quern to grind the grains for his bread.
这位农民用石磨来磨谷物做面包。
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2. The quern is an essential tool in the traditional Irish kitchen.
石磨是爱尔兰传统厨房中不可或缺的工具。
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3. The quern has been passed down through generations of farmers in this region.
这个地区的农民一代代传承着石磨。