动词中文翻译
中文翻译：研磨
同义词：
['crushing', 'grinding', 'milling']
例句：
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1.The engineer used a grinding machine to smooth the surface of the metal.
工程师使用一台磨床来平滑金属的表面。
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2. The grains were ground down into flour by the miller's wheel.
面粉是由磨坊的轮子碾成的谷物磨成的。
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3.The stone was ground into a fine powder for use in medicine.
石头被磨成细粉，用于医药。