英语词汇“roche alum”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	roche alum
释义	WordReference Random House Unabridged Dictionary of American English © 2024 roche′ al′um (rōch),USA pronunciation [Chem.] Chemistryan alumlike substance derived from alunite. 1400–50; roche cliff, rocky height (now obsolete), late Middle English (see rock¹); apparently partial translation of Middle French alum en roque, alun de roche
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