Ключевые слова: alarm, audio, audiobook, automobile, ball, basket, black, blank, board, car, chalk, chalkboard, contour, education, electricity, energy, equipment, eraser, exam, game, headphones, icon, idea, illustration, innovation, isolated, lamp, light, line, linear, notification, outline, paper, pencil, ring, ringing, school, set, silver, sound, sport, transport, transportation, travel, vehicle,