Like N-nitroso-dimethylamine, or NDMA, which is one of the most carcinogenic compounds on Earth.

就像 N-亚硝基二甲胺，或 NDMA，它是地球上最致癌的化合物之一。

Many of the samples were also loaded with polychlorinated biphenyls, highly carcinogenic chemical compounds that were common before their international ban in 2001.

许多样本还富含多氯联苯，这是一种高度致癌的化学物质，在2001年国际禁止之前很常见。