Ключевые слова: act, acting, adult, adults, audience, back, business, business training, businessman, center, chair, communications, conference, conferencia, convention, education, equipment, formation, formazione, group, hall, instructor, konferencja, learn, learning, lecture, listens, meeting, orator, person, presentation, room, row, screen, seat, seminar, table, teaching, training, training business, training room, treinamento, work,