Ключевые слова: academic, auditorium, blur, briefing, casual, cheerful, class, classroom, coach, college, conference, content, course, discuss, education, explain, female, friendly, gather, indoors, information, knowledge, lady, lecture, lecturer, lesson, meeting, mic, microphone, positive, presentation, seminar, share, show, side view, smile, speak, speaker, speech, study, teacher, training, tutor, university, woman,