Ключевые слова: asian, atom, biology, bond, bonding, boy, cheerful, chemical, chemistry, class, colourful, connecting, connection, desk, discovery, education, elements, experiment, formula, h2o, hand, holding, hydrogen, indian, lab, laboratory, learning, liquid, male, model, molecular, molecule, molecules, oxygen, people, physics, pupil, research, school, schoolboy, schoolkid, science, shape, structure, student, study, studying, table, uniform, water,