Ключевые слова: adult, analysis, analyzing, beaker, biology, biotechnology, chemical, chemist, closeup, concept, development, discovery, equipment, experiment, expertise, fluid, glass, health, healthcare, holding, hospital, human, indoors, instrument, lab, laboratory, liquid, look, looking, male, man, medical, medicine, person, pharmaceutical, portrait, professional, protective, sample, science, scientific, scientist, smile, specialist, study, technology, test, tube, work, worker,