Ключевые слова: adult, audience, auditorium, board, business, campus, center, chair, china, class, classroom, college, conference, convention, desk, education, empty, furniture, group, hall, hongkong, indoors, inside, interior, learn, lecture, lecturer, light, meeting, modern, new, nobody, presentation, room, row, school, screen, seat, seminar, session, study, table, teacher, teaching, theater, training, university, visual, white, work,