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单词 bort
释义

bort

/bɔːt /
(also boart)
noun [mass noun]
Small, granular, opaque diamonds, used as an abrasive in cutting tools.Black or gray-black, massive, granular to compact bort is known as carbonado.

Origin

Early 17th century: from Dutch boort.

Rhymes

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更新时间:2025/1/24 9:31:10