英语词汇“dull coal”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	dull coal
释义	dull coal dull coal [¦dəl ¦kōl] (geology) A component of banded coal with a grayish color and dull appearance, consisting of small anthraxylon constituents in addition to cuticles and barklike constituents embedded in the attritus.
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