单词	underclay
释义	underclay noun : a layer of clay beneath a coal bed often containing fossil roots of coal plants and constituting fireclay Word History Etymology under entry 3 + clay
随便看	lunkheaded lunkheads lunks lunoid Lunt lunted lunting lunts lunulae lunular Lunularia lunulas lunulate lunulated lunule lunules lunulet lunumidella luny lunyie Lunyoro lunyoros Lunéville Luo luoes

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