Ключевые слова: action, blank, business, center, chair, classroom, conference, convention, cultural, culture, desk, display, empty, hall, inside, instructor, interior, learn, learning, lecture, lecturer, light, listen, listeners, lonely, meeting, microphone, modern, new, old, people, podium, presentation, public, room, row, scene, school, screen, seat, seating, student, table, teacher, university, visual, work,