Ключевые слова: academic, atom, bachelor, board, book, books, boy, cap, class, classroom, college, degree, diploma, education, examination, graduating, green, hat, kid, learning, lesson, looking, master, model, molecular, molecule, mortar, mortarboard, physicist, physics, primary, pupil, reading, research, school, schoolboy, science, secondary, smart, student, study, studying, successful, teen, teenager, textbook, textbooks, trainee, training, young,