Ключевые слова: activity, architect, architecture, blue, bridge, built, business, city, concrete, construction, crane, development, engineer, engineering, equipment, estate, exterior, frame, growth, high, house, industrial, industry, iron, lift, machine, material, modern, new, nobody, occupation, office, people, progress, project, site, sky, skyscraper, steel, structure, tall, technology, urban, work, worker,