英语词汇“rock-butter”的英文翻译、意思、用法、释义-英汉汉英词典-MRM资料网

单词	rock-butter
释义	詞目：Rock-butter 1908顏惠慶英華大辭典Rock-buttern.1A soft mineral substance, consisting of alum mixed with alumina and oxide of iron, 明礬類明礬類p 1934　1908顏惠慶英華大辭典　1筆
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