Ключевые слова: adult, advice, audience, backs, blur, briefing, business, businessman, coaching, conference, congress, convention, cooperation, corporate, display, education, entrepreneur, event, executive, expert, explaining, faculty, focus, gesturing, group, hall, indoors, knowledge, lecture, manager, meeting, multimedia, participants, people, podium, presentation, professional, projector, public, rear, screen, seminar, speaker, speech, study, teacher, teaching, training, view, workshop,