Ключевые слова: adult, biochemistry, biology, biotechnology, caucasian, chemical, chemist, chemistry, clinic, closeup, coat, concentration, cropped, doctor, education, equipment, examination, experiment, forensic, handsome, health, hospital, job, lab, laboratory, look, male, man, medical, medicine, microbiology, microscope, one, people, professional, research, science, scientific, scientist, smart, student, study, technician, technology, test, tube, white, work, worker, young,