Sent_en: 2zh The researchers found levels of DDT 60 times higher, 25 times more mercury, and 10 times higher hexachlorobenzene in ponds that seabirds frequented compared to nearby ponds birds did not use.
Sent_yy: 研究人员发现，与鸟类没有光顾的附近池塘相比，海鸟经常光顾的池塘中的滴滴涕水平高60倍，汞含量高25倍，六氯苯含量高10倍。