To rub, crush, grind, or pound into fine particles or a powder; pulverize.

研磨捣碎搓擦、磨细、捣烂，使…研磨成细粉末，使成粉末状。

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To make the dressing, the researchers grind crab shells to a fine powder and mix it with chemicals to convert the base material, chitin, into chitosan.

为制做敷药绷带的基层，专家们把蟹壳研磨成粉末状，又加人一些化学制剂，将基层的聚乙酸氨基葡糖转换成聚氨基葡糖。

youdao

To make the dressing, the researchers grind crab shells to a fine powder and mix it with chemicals to convert the base material, chitin, into chitosan.

为制做敷药绷带的基层，专家们把蟹壳研磨成粉末状，又加人一些化学制剂，将基层的聚乙酸氨基葡糖转换成聚氨基葡糖。

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