According to the Law of Conservation of Mass, we have established the mathematical model of heavy metal pollution in Le 'an River, and have attempted to find the solution to it.
根据质量守恒定律，建立乐安河重金属污染数学模型，并对其进行了求解。
According to the Law of Conservation of Mass, we have established the mathematical model of heavy metal pollution in Le 'an River, and have attempted to find the solution to it.
根据质量守恒定律，建立乐安河重金属污染数学模型，并对其进行了求解。
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