Ключевые слова: audience, auditorium, board meeting, businessman, communication, conference hall, discussion, earth, education, equipment, experience, group meeting, illumination, keyword, know, knowledge, large group of people, learning, lecture, limit, low light, manager, many people, meeting, practice, presentation, project, projection, projector, public, science, screen, seminar, speaker, speech, spokesman, stage, strategy, student, success, talk, technology, training, university, video conference, visual, world, you,