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 建筑学
construct, architect, architecture, design, elevator, construction, skyscraper, design element, log structure, cabin, beam, wall, style, prototype, building technique, new material, ten stories high, metal-frame, construction, glass box, a glass-shelf framed in a metal grid 能源和环境
fossil fuel, coal, oil, gas, process of photo synthesis光合作用, solar energy, nonrenewable, energy conservation, resource, alternative, energy source, tidal energy, coalification, traffic jam, fuel-efficient节能型的, rush hour, pollute, zero emission, environment, wildness, preservation, atmosphere, climate, carbon, dioxide, burning of coal and oil, global warming, green house effect温室效应, rise in sea level, ice-cap, melt, long-term climatic change, clean up, offshore spillage, environmental awareness club, recycling center再循环利用中心, litter, trash bag, garbage, air pollution, pollutant, desertification沙漠化, deforest, flood, drought, water shortage 生物学