名词
中文翻译：磨坊的支柱
同义词：
['mill', 'millstone例句：1. The millstone is the foundation of the mill.（磨石是磨坊的基础。）']
例句：
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1. The millstone is the foundation of the mill.
磨石是磨坊的基础。
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2.He used to work on the millstones in the old mill.
他过去在旧磨坊里磨石。
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3.The millstone was so worn that it could no longer be used for grinding.
磨石磨损严重，无法再用于研磨了。