Ключевые слова: abstract, activity, athletic, background, championship, clean, color, competition, contest, course, detail, equipment, exercise, field, floor, ground, maintenance, material, outdoor, paint, pattern, plastic, play, playground, race, racetrack, recreation, road, rubber, run, safe, safety, soft, sprint, stadium, start, structure, surface, texture, textured, tool, track, wallpaper, work,