·2,447,543篇论文数据，部分数据来源于NoteExpress
The safety of vegetable pollution by heavy metals was evaluated referring to national food hygienic and vegetable quality gradation standards.
参照国家食品卫生标准和蔬菜质量分级标准，对蔬菜的重金属污染程度进行了安全性评价。
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