石灰石地貌 shíhuīshídìmào karst topography Origin Definitions Defs Strokes Stroke Words Sentences Sents 石灰石 shíhuīshí limestone limestone; sedimentary rock consisting mainly of calcium carbonate, used as a building material and for making lime and cement地貌 dìmào landforms general configuration of the earth's surface; geomorphology; terrain features; relief