英语词汇“black copper”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	black copper
释义	black copper noun 1. : melaconite 2. : a product containing usually 70 to 99 percent of copper formed in smelting copper ores direct to metal without first forming matte or by remelting old or scrap copper and copper alloys
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