Ключевые слова: adult, agriculture, analyzing, bacterium, beard, biology, biotechnology, caucasian, chemist, chemistry, closeup, discovery, doctor, equipment, experiment, eyewear, face, food, freshness, fruit, glass, glove, gloves, hand, healthcare, holding, human, laboratory, looking, males, man, medicine, men, nature, occupation, one, oranges, person, portrait, protective, research, safety, science, scientific, scientist, white, working, yellow,