英语词汇“blue metal”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	blue metal
释义	blue metal blue metal [′blü ‚med·əl] (geology) The common fine-grained blue-gray mudstone which is part of many of the coal beds of England. blue metal A hard rock, bluish in color, which is crushed and used in macadam.
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