Ключевые слова: 6146, adult, attractive, blackboard, bow, caucasian, chalkboard, cheerful, chemical, chemist, chemistry, cute, educational building, flasks, glad, glasses, glassware, gown, hair, happiness, holds, inside, joy, lab, laboratory, male, medical, model, molecular, one person, portrait, positive, professor, red hair, school, science, scientific, scientist, smile, stick, study, test, tie, white, young,