The distributing in environment, transfer rule and effects on health of many elements are different with its various valencies, so the valencies analysis of element is especially important.
许多元素在环境中的分布、迁移规律以及对人体健康的影响与其价态有关，因而元素价态分析在环境监测中尤为重要。
The distributing in environment, transfer rule and effects on health of many elements are different with its various valencies, so the valencies analysis of element is especially important.
许多元素在环境中的分布、迁移规律以及对人体健康的影响与其价态有关，因而元素价态分析在环境监测中尤为重要。
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