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1.The contamination coefficient of the water is 0.5, indicating that it contains a certain amount of pollutants.
水的污染系数为0.5，表示其中含有一定量的污染物。
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2. The contamination coefficient of the soil is an important factor in assessing its environmental quality.
土壤的污染系数是评估其环境质量的重要因素。
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3. The contamination coefficient of the air is a key indicator of the health risks associated with air pollution.
空气中的污染系数是衡量空气污染相关健康风险的关键指标。