soil heavy metal elements 土壤重金属元素
heavy metal elements risk 重金属元素风险
toxic heavy-metal elements 有毒重金属元素
Toxic Heavy Metal Elements 有害重金属元素
heavy metal elements in soil 土壤重金属元素
heavy metal elements correlation analysis 重金属元素间相关性分析
The content of heavy metal elements in a leaf is higher than in a petiole.
蔬菜中重金属元素含量，叶片要显著超过叶柄。
This paper studies an analysis of toxic heavy metal elements in toys by ICP AES.
本文介绍了利用ICP-AES对玩具中有害重金属元素的分析研究。
The international organization regulates the contents of heavy metal elements in the import medicines definitely.
国际上对中药中重金属元素的含量也有明确规定。
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