地层下陷 dìcéngxiàxiàn land subsidence Origin Definitions Defs Strokes Stroke Words Sentences Sents 地层 地層 dìcéng stratum a layer of rock or sediment in the earth's crust, including sedimentary, igneous, and metamorphic rocks; geological formation下陷 xiàxiàn to sink to sink, cave in, or sag; to subside