Ключевые слова: academic, audience, briefing, business, businessman, center, coaching, conference, congress, convention, cooperation, corporate, education, educator, event, explaining, forum, gesturing, group, hall, indoors, information, institute, knowledge, learn, lecture, lecturer, listeners, male, man, manager, meeting, participants, people, presentation, professional, public, rear, room, screen, seminar, sitting, speaker, speech, study, studying, teacher, teaching, training, university,