Ключевые слова: analyzing, bacterium, caucasian, chemical, chemistry, coveralls, danger, dirty, environment, environmental conservation, environmental damage, environmentalist, equipment, expertise, flask, forest, garden, glasses, hand, holding, insecticide, outdoors, pest, pollution, probe, protective eyewear, protective glove, protective suit, protective workwear, purity, quarantine, reagent, research, science, scientific experiment, scrutiny, test tube, toxic substance, unhygienic, water, water pollution, water sample, woman,