Ключевые слова: analysis, background, beakers, biochemistry, biology, biotechnology, blue, chemical, chemist, chemistry, color, dirty, document, ecology, engineering, environmental, experiment, flasks, glass, glassware, hazard, health, industrial, industry, laboratory, liquid, liquid spill, medicine, poison, pollution, research, sample, science, scientific, scientist, stopper, substance, technology, test, test tube, test tubes, toxic, transparent, waste, water,