contamination of heavy metals
contamination of heavy metals
重金属污染
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Environmental baselines to enable an assessment of the degree of contamination of soils and agricultural crops by heavy metals have not been established in the majority of African countries.
UNESCO: EARTH SCIENCES FOR SOCIETY
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Officials have been able to conclude that the dolphins' deaths were not due to lack of food, interaction with fisheries, poisoning with pesticides, biotoxin poisoning or contamination by heavy metals.
CNN: Peru investigates mystery pelican deaths