Polychlorobiphenyl
多氯联苯
🗣️ 情景例句
I care about people, not things.
我关心的是人而不是东西。
Which train do I take to Philadelphia?
去费城乘哪趟车？
Textile business has become more and more difficult since the competition grew.
随着竞争的加剧，纺织品贸易越来越难做了。