这种污染物很容易在大范围的地理区域内扩散，保持其毒性，并具有在生物脂肪组织内积累的倾向。

The pollutants disperse easily across wide geographic areas, retain their toxicity, and have a tendency to accumulate in the fatty tissues of organisms.

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但银同样也会在环境中积累，当其达到一定浓度时将有毒性。

But silver can also accumulate in the environment and, at certain levels, prove toxic.

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您不要急于服用维生素a补充药物，如果摄入过多维生素a，机体无法将其排出，会积累产生毒性。

If you do not have to rush to take vitamin a supplements, excessive intake of vitamin a, which the body does not discharge it, will produce toxic accumulation.

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