Ключевые слова: art, bag, book, bus, chemistry, circle, class, collection, computer, design, document, education, expertise, flat, geography, global, globe, graduation, group, hat, icon, ideas, illustration, internet, learning, microscope, modern, object, objects, paper, pen, pencil, research, ruler, school, science, set, sign, single, stationery, study, studying, symbol, teaching, technology, university,