Ключевые слова: adult, audience, background, board, briefing, business, businessman, caucasian, center, coaching, communication, conference, congress, corporate, discussion, education, event, executive, explaining, group, hall, image, indoors, information, leadership, lecture, lecturer, listeners, male, man, manager, meeting, office, participants, people, person, podium, presentation, professional, public, room, screen, seminar, speaker, successful, teacher, teaching, training, university, young,