Ключевые слова: adult, alcohol, analyzing, biology, blue, bottle, caucasian ethnicity, chemical, chemistry, closeup, discovery, drink, drinking glass, drop, equipment, flask, glass, hand, healthcare and medicine, holding, human finger, human hand, indoors, industry, laboratory, liquid, males, material, medicine, men, nature, night, occupation, one person, pouring, purified water, research, science, scientific experiment, scientist, single object, skill, technology, transparent, water, wet, wine, working,