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  1. Oxford Dictionary

    coalfield

    • IPA[ˈkəʊlfiːld]

    英式

    • n.
      an extensive area containing a number of underground coal strata.

    • noun: coalfield, plural noun: coalfields

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    coalfield

    • IPA[ˈkōlˌfēld]

    美式

    • n.
      an extensive area containing a number of underground coal deposits.

    Oxford American Dictionary