Ключевые слова: adult, analyzing, beaker, biochemist, biochemistry, biology, biotechnology, blue, chemical, chemist, chemistry, chemistry class, closeup, development, discovery, education, equipment, flask, glass, healthcare and medicine, holding, human hand, indoors, industry, laboratory, laboratory glassware, liquid, material, medical research, medical test, medicine, men, microbiology, occupation, one person, professional occupation, protective eyewear, protective glove, research, science, scientific experiment, scientist, technician, technology, test tube, tube, working,