Ключевые слова: adult, african, audience, back, black, board, briefing, business, businessman, businesspeople, career, classroom, company, conference, congress, convention, crowd, education, ethnic, expertise, focus, formal, global, group, head, human, international, learn, lecture, listen, male, man, meeting, people, person, presentation, rear, rear view, seat, seminar, session, sit, students, study, team, together, training,