Ключевые слова: 14100051, 6065 years, adult, back view, beaker, chemical, chemistry, colour, container, cropped, day, experiment, green, hand, head, head and shoulders, headshot, healthcare and medicine, holding, indoors, man, measuring, occupation, one person only, pouring, precision, research, rubber gloves, science, scientist, selective focus, senior adult, senior man, shoulders, technology, test, white coat, whites, working,