Ключевые слова: abstract, adult, attendee, audience, background, blur, blurred, boardroom, business, businessman, center, classroom, communication, concept, conference, congress, convention, copy, corporate, decoration, design, education, equipment, event, group, hall, interior, international, learn, lecture, light, media, meeting, modern, people, person, photo, podium, presentation, professional, public, room, seminar, space, speaker, speaking, speech, study, table, white,