Ключевые слова: 20s, 30s, 40s, 50s, beaker, black, blue, caucasian, cheerful, chemical, chemicals, chemist, chemistry, clinical, college, digital tablet, drug, examining, experimenting, female, formula, glass, glasses, gloves, happy, hispanic, holding, institute, lab, lab coat, laboratory, looking, looking at camera, male, man, mature adult, medical, medicine, microscope, mid adult, pharmaceuticals, pharmacy, protection, protective suit, research, safety glasses, science, scientific, scientist, smiling, standing, structure, student, tablet computer, tablet pc, testing, university, woman, young adult,