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dispersion calculation The calculation of pollutant dispersion is based on the use of air dispersion models that mathematically simulate atmospheric conditions and behaviour. Dispersion models can provide concentration or deposition estimates and can be used to evaluate both existing and hypothetical emissions scenarios
environ.	扩散计算 (污染扩散的计算是基于空气扩散模型通过数学方法来模拟大气条件和行为；扩散模型可以估计污染物的浓度或沉降量，同时可以评估现有或假设的排放情形。)