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。
Source and effect of Protected vegetable base soil heavy metals pollution on vegetable quality were studied in this article, and the control methods of heavy metal pollution was expounded carefully.
本文综述了重金属污染现状，各种污染金属的来源，重金属对蔬菜品质产生的影响，并着重阐述了重金属污染的防治方法。
Although nutrients from animals may be of higher quality or more readily absorbed than vegetable sources, it is possible to have a healthy vegetarian diet.
尽管动物养分可能是高质量或比蔬菜来源的食物更加容易吸收，但拥有一个健康的素食膳食是可能的。
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