由于镉有不可降解性和极长半衰期的特性，镉污染对动物健康已经构成了巨大的潜在性威胁。
Additionally, due to the undegradability and long half-times, cadmium will throw great threat on animal health.
沿岸土壤层中砂层为受污染的河水对浅层地下水的补给提供了条件，造成浅层地下水污染，对当地生态系统和人类健康构成潜在的威胁。
The sand layer in the soils could provide transportation of pollutants from the polluted rivers, which could be potential threat to ecosystem and local population.
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