Ключевые слова: academic, background, class, clothespins, college, communication, concept, course, education, educational, english, foreign, grey, international, knowledge, language, learn, learning, lesson, linguistic, note, object, paper, phrase, pin, pinned, polyglot, reminder, school, speak, speaking, speech, student, study, studying, teach, teacher, teaching, thread, time, translate, university, vocabulary, wall, yellow,