Ключевые слова: academic, ask, audience, background, brick, briefing, business, businessman, center, coaching, conference, congress, convention, corporate, discussion, education, event, explaining, glass, group, hall, hand, indoors, information, knowledge, lecture, lecturer, listeners, listening, manager, meeting, men, participants, people, presentation, professional, public, question, seminar, sitting, speaker, speech, standing, study, teach, teaching, training, university, work, workshop,