Ключевые слова: adult, analysis, analyzing, beaker, biochemistry, biology, biotechnology, caucasian, chemical, chemist, chemistry, closeup, coat, development, discovery, doctor, equipment, experiment, glass, health, healthcare, human, industry, lab, laboratory, liquid, male, man, medical, medicine, microbiology, microscope, pharmaceutical, professional, research, researcher, safety, science, scientific, scientist, student, study, technician, technology, test, tube, two, white, work, worker,