单词	boulderstone
释义	boulderstone /ˈbəʊldəstəʊn / noun A large rock, typically one that has been worn smooth by erosion.Against the huge boulderstones which lay scattered about on the shore, the mighty waves broke incessantly.... Large boulderstones are scattered over the beach, and sometimes form shoals as far as five miles from shore. They broke the door through with a boulderstone. Origin Middle English: of Scandinavian origin.
随便看	ergonomic ergonomically ergonomics ergonomist ergosphere ergosterol ergot ergotamine ergotism erh hu erhu erica ericaceous Ericson Ericsson, John Ericsson, Leif Eric the Red Eridanus Erie Canal Erie, Lake erigeron Eriksson Erin Erinys Eris

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