过度捕捞的很多海洋物种中，有许多含有高浓度的汞和多氯联苯。
Many Marine species are overfished, and some have high levels of mercury and PCBs.
多氯联苯和六氯苯都是长期存在，并积累在食物链中的污染物，取缔这些物质需要长达数十年的时间。
PCBs and HCB are both long-lived pollutants that accumulate in food chains and take decades to break down.
事实上，研究表明超过95%的12岁以上的美国人血液中仍然检测出含有多氯联苯。
In fact, studies have shown that more than 95 percent of Americans older than 12 still have detectable levels of PCBs in their blood.
多氯联苯在变压器中被用作热交换器，广泛用在塑料和纸张的制造中。
They were developed as heat exchangers in electrical transformers, and were widely used in plastics and paper manufacturing.
结论：多氯联苯化合物在皮肤血管瘤患儿头发中的水平增高。
Conclusion: PCBs in the hair of infants with skin hemangioma is much higher.
随着多氯联苯的广泛使用，越来越多的多氯联苯进入环境，并在环境中积蓄下来。由于多氯联苯的难降解性和毒性，所以防治多氯联苯的污染尤为重要。
With widely used, more and more PCBs entered environment and accumulated there. The prevention of PCBs is specially important due to its toxicity and the difficulty of degradation .
分析了江苏无锡鼋头渚和江西共青城夜鹭卵中多氯联苯同系物的残留状况。
The residue situation of PCB congeners in eggs of night heron breeding in Wuxi area of Jiangsu and Gongqing City of Jiangxi was analyzed.
每一批北欧天然鱼油是第三方测试环境中的毒素，包括重金属，二恶英和多氯联苯。
Every batch of Nordic Naturals fish oils is third-party tested for environmental toxins, including heavy metals, dioxins, and PCBs.
样品前处理是食品中多氯联苯分析的关键步骤，近几年在食品中多氯联苯的提取、净化和分离方面出现了一些新技术。
The pretreatment of food samples is a crucial procedure for determination of polychlorinated biphenyls in them. Several new pretreatment methods have been developed during recent years.
该组中列出的12个高度危险的物质，包括前面提到二恶英，呋喃和多氯联苯（60）。
The group of 12 listed highly dangerous substances includes mentioned earlier dioxins, furans and biphenyls (60).
采用加速溶剂萃取（ASE）—气相色谱法测定土壤中的12种类二恶英多氯联苯。
12 kinds of dioxin-like polychlorinated biphenyls(PCBs)in soil were determined by accelerated solvent extraction(ASE)and gas chromatography method.
介绍了水体中污染物的种类，详述了辽河流域受到多环芳烃类、有机氯农药、多氯联苯及其他有毒有害物的污染情况。
The species of pollutants in the water body were introduced, and the occurrence of PAHs, OCPs, PCBs and other toxic substances in Liaohe Basin was reviewed.
介绍了水体中污染物的种类，详述了辽河流域受到多环芳烃类、有机氯农药、多氯联苯及其他有毒有害物的污染情况。
The species of pollutants in the water body were introduced, and the occurrence of PAHs, OCPs, PCBs and other toxic substances in Liaohe Basin was reviewed.
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