Ключевые слова: ancient, architecture, background, bow, cement, conservation, construction, dam, ecology, electric, electricity, energy, engineering, environment, environmental, flood, flow, forest, generate, generator, holiday, hydro, hydroelectric, hydropower, industrial, lake, landmark, landscape, large, mountain, nature, plant, power, river, scenic, sky, spillway, station, structure, technology, tower, transport, transportation, travel,