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单词
roche alum
释义
WordReference Random House Unabridged Dictionary of American English © 2024
roche
′
al
′
um
(rōch),
USA pronunciation
[
Chem.
]
Chemistry
an alumlike substance derived from alunite.
1400–50;
roche
cliff, rocky height (now obsolete), late Middle English (see
rock
1
); apparently partial translation of Middle French
alum en roque, alun de roche
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更新时间:2025/7/23 13:06:11