英语词汇“coal ball”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	coal ball
释义	coal ball coal ball [′kōl ‚bȯl] (geology) A subspherical mass containing mineral matter embedded with plant material, found in coal seams and overlying beds of the late Paleozoic.
随便看	nrldc nrl det ssc nrl (disambiguation) nrle nrleuv nrlf nrlfcu nrlfltsuppdet nrlg nrlhf nrli nrlin nrlkw nrlm nrlmg nrln nrl (naval research lab) layered ocean model nrl (naval research laboratory) low-frequency test array nrl (naval research laboratory) satellite image processing system nrlo nrloac nrlp nrlq nrlr nrlrc

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