Ключевые слова: analysis, background, biology, black, chemical, chemistry, closeup, concept, danger, drop, electronic, environment, equipment, exam, gadget, glass, health, healthy, industry, instrument, laboratory, liquid, measurement, medical, medicine, microbiology, mobile, modern, particle, phone, pollution, protect, protection, protective, red, repair, research, scientist, smartphone, splash, surface, technician, technology, test, tube, water, waterproof, wet, work, worker,