According to the heavy metal contents in the fruits, soil absorption and atmospheric dust become the main sources of heavy metal pollution in crops.
通过对不同处理方式处理后的水果中重金属的分析表明，土壤吸收和大气尘降是农作物中重金属的主要来源。
Mercury (Hg) is the unique heavy metal transported with gaseous elemental Hg (GEM). Atmospheric Hg can be transported for a long distance, which plays an important role in global Hg cycle.
汞是唯一以气态单质形态随大气循环参与全球迁移的重金属元素，大气汞的长距离传输是汞的生物地球化学循环的重要特性之一，对全球汞循环有着重要的影响。
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