Ключевые слова: asian, biology, blackboard, boy, chemical, chemist, chemistry, chemistry class, child, children, class, classroom, discovery, education, en, experiment, expertise, flask, glasses, goggles, lab coat, labcoat, laboratory, learning, lesson, microscope, people, protective, research, school, science, scientific experiment, scientist, student, studying, teacher, teamwork, teenage, university, vietnamese, working,