Ключевые слова: academic, audience, auditorium, background, blurred, briefing, business, businessman, career, center, classroom, coaching, conference, congress, convention, corporate, education, event, face, focus, formal, forum, group, hall, information, institute, knowledge, learn, lecture, listeners, manager, meeting, participants, partners, people, person, presentation, professional, rear, seat, seminar, session, sit, sitting, tie, training, unrecognizable, view, watching, workshop,