Ключевые слова: adult, backgrounds, beaker, biochemist, biology, bottle, caucasian, chemical, chemist, chemistry, closeup, development, doctor, eyewear, face, flask, fumes, glass, glove, green, health, healthcare, holding, industry, isolated, lab, laboratory, liquid, look, looking, medical, medicine, men, one, people, professional, protection, protective, research, science, scientific, scientist, smoke, student, study, test, tube, white, work, worker,