Ключевые слова: analysis, biology, boy, caucasian, chemical, chemicals, chemistry, child, childhood, class, classroom, clinic, clinical, cute, discovery, education, exam, experiment, eyeglasses, fun, girl, glasses, kid, lab, laboratory, lad, learn, lifestyle, liquid, looking, male, medical, medicine, people, person, research, safety, sample, school, science, scientific, scientist, student, study, test, tube, uniform, white, workplace, young,