Ключевые слова: analysis, analyze, background, biology, biotechnology, chemical, chemistry, citrus, closeup, composition, doctor, engineer, equipment, examine, experiment, female, flask, food, fruit, glass, grapefruit, health, industry, lab, laboratory, liquid, medical, medicine, microbiology, microscope, pesticides, production, protection, reagent, research, safety, sample, scalpel, science, scientific, scientist, slide, technician, technology, test, toxins, tube, worker,