地质学
earthquake, seismic activity, tidal force, erie canal, inland waterway, great canyon, coast, volcanic ash, eruption, filed trip, rock formation, death valley, desert, layer, fold, waterfall, rapid, natural wonder, nile river, crust, colorado river, swale erosion, geologist, rocky mantle of the continent, mid-ocean ridge, landlocked area内陆, atmosphere, active volcano活火山, ice sheet, glacier, melt global warming, plain, fossil化石, bored hole, fault断层, make up the earth interior, vibration, p waves, s waves, crust, core, molten lava岩浆
责任编辑:小草