Ключевые слова: anonymous, audience, auditorium, briefing, business, businesspeople, chair, colleague, company, conference, contemporary, corporate, course, coworker, education, entrepreneur, evening, event, faceless, group, horizontal, illuminate, indoors, lecture, lesson, listen, manager, modern, office, participant, people, presentation, professional, public, screen, seminar, sit, speech, team, unrecognizable, watch, window,