Ключевые слова: active, analyzing, background, biology, biotechnology, book, bottle, boy, chemical, chemist, chemistry, child, childhood, class, concept, discovery, education, equipment, experiment, fun, girl, glass, group, happy, joy, knowledge, lab, laboratory, learn, learning, lesson, library, lifestyle, liquid, little kid, medicine, microscope, people, play, portrait, research, school, science, scientific, scientist, student, study, success, test tube, young,