Ключевые слова: boring, building, car, city, construction, dirt, dirtied, dirty, discover, drill, drilling, earth, ecology, engine, engineering, equipment, geologic, geology, ground, hole, house, industrial, industry, machine, mine, mineral, people, pipe, pump, research, rig, road, rock, sample, sampling, search, service, site, soil, strong, summer, survey, technology, test, testing, tool, truck, vehicle, wheel, work,