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单词
buhrstones
释义
buhrstone
, also
burrstone
/bûrˈstōn/
noun
A variety of quartz, containing many small empty cells, which give it a roughness of surface particularly adapted for millstones
A millstone made of this
ORIGIN:
Perh connected with burr
1
, from its roughness
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更新时间：2025/3/25 9:08:16