Ключевые слова: activities, american, area, arena, artificial, athletic, backboard, background, ball, baseball, basket, basketball, black, blackboard, block, board, building, chalk, challenge, championship, circle, class, classroom, clock, cloud, coach, competition, countdown, digital, dunk, event, field, football, game, goal, lose, pitch, play, playground, racetrack, score, scoreboard, scoring, sign, sky, soccer, sport, stadium, team, time,