Based on kinetic principle and the Iaw of inputand output, we have studied the contarnination factor

中文解释

运用动力学原理和投入产出法则研究了浙江省某铅锌冶炼厂周围农业土壤中镉的污染因素。

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overgrows groschen Propersi Tracey 著述 motivator set sth ablaze claret cup increase customers diminishing return