They were banned in the 1980s, but the chemicals take a long time to break down and can linger in the oceans, accumulating in the blubber of whales, dolphins and porpoises1.
尽管在20世纪80年代,多氯联苯已被禁用,但这种化学物质需要很长时间才会分解,而且会滞留在海洋中,在鲸鱼、海豚和鼠海豚的鲸脂中积聚。
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