单词 | red mud |
释义 | red mudnoun 1 Geology a mud of terrestrial origin, found on continental shelves and in other shallow waters, and coloured red by iron oxides. 2A residue from the extraction of alumina from bauxite, coloured red by iron impurities. OriginLate 17th century; earliest use found in Robert Boyle (1627–1691), natural philosopher. |
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