Ключевые слова: academic, academy, audience, auditorium, background, briefing, business, businessman, busy, center, chair, class, classroom, college, communication, concept, conference, congress, convention, corporate, education, educator, equipment, graduates, hall, lecture, lecturer, lesson, light, media, meeting, microphone, people, presentation, professional, professor, public, room, school, semester, seminar, speak, speaker, speech, stage, student, study, teacher, university,