polychlorinated biphenyl
名词 n.
英 /ˌpɒlɪˌklɔːrɪneɪtɪd ˈbaɪfənɪl/
美 /ˌpoʊliˌklɔrəˌneɪtəd ˈbaɪfənɪl/
英文释义
名词 n.
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Any of a class of aromatic organic compounds formed by the chlorination of the hydrocarbon biphenyl; they have many industrial applications but are now considered persistent organic pollutants.
— Another environmental factor thought to be affecting some coastal birds, although comparatively little is yet known about its extent or origin, is the presence of marine pollutants such as polychlorinated biphenyls (PCBs) and toxic heavy metals.
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数据来源: Wiktionary