Ключевые слова: active, activity, arena, artificial, athlete, athletic, background, beijing, business, challenge, colorful, compete, competition, competitive, concentration, concept, conceptual, course, curve, direction, empty, exercise, field, finish, focus, forward, game, ground, lifestyle, match, olympics, outdoor, pattern, perspective, race, racetrack, ready, red, run, sport, sprint, stadium, success, surface, texture, track, winner,