豆类、瓜类、茄果类、食用菌类样品中硝酸盐没有超过一级标准的，污染较轻。
Nitrate in leguminous, melon and nightshade vegetable was below the level I, which indicated that these vegetable were slightly polluted.
本论文包括三部分：第一部分为“食用菌类微生物的生物学特征和重金属研究状况”；
The first part is the research about heavy metals (HMs) and biological character of edible fungi;
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