单词	coalfield
释义	coalfield /ˈkəʊlfiːld / noun An extensive area containing a number of underground coal strata.In the Heshan coalfield, all coals show a strong marine influence, as indicated by the very high organic sulphur contents in the coals.... He was interested in the local rocks, and in 1791 set up for himself in the Somerset coalfield, where he was engaged in underground mine surveys and calculations of coal resources. People here know there is a lot of ill health in the coalfields area, but the extent of it shocked everyone. Rhymes goldfield, Sutton Coldfield
随便看	semigloss semi-independent semi-infinite semi-invalid semi-lethal semi-liquid semi-literacy semi-literate semilunar semilunar bone semilunar cartilage semilunar valve semimajor axis semimetal semimetallic semiminor axis semi-modal semi-monocoque semi-monthly seminal seminally seminal vesicle seminar seminarian seminarist

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