Ключевые слова: 30s, activities, adult, auditorium, belgian, break, casual, caucasian, cheerful, class, college, communicating, converse, course, discussing, educating, emotion, european, explaining, female, friendliness, german, hungarian, indoors, intelligent, interior, male, man, person, portrait, positive, process, recess, relaxation, science, smile, student, studying, talk, togetherness, university, woman,