Ключевые слова: 20s, analyzing, biochemist, biochemistry, biology, biotechnology, caucasian, chemist, chemistry, computer, doctor, examining, frowning, healthcare, healthcare and medicine, hospital, indoors, interface, lab, laboratory, looking at camera, machine, machinery, male, man, medical, medical research, medical sample, medicine, portrait, practitioner, pressing, safety glasses, science, scientific experiment, scientist, selecting, serious, specialist, sterile, stern, studying, technician, technology, unsmiling, young adult,