英语词汇“roman 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	roman alum
释义	roman alum noun Usage: usually capitalized R : alum crystallized in cubes; especially : alum formerly made from alunite at Tolfa near Rome that was reddish because of a very small amount of iron oxide though otherwise very pure
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英语词典包含332784条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。