Polychlorobiphenyl
多氯聯苯
??? 情景例句
Which subject were you best interested in?
你對哪一科最有興趣？
He that lies down (sleeps) with dogs must rise up with fleas.
與惡人交終會變惡；近朱者赤，近墨者黑。
I lost the door key about here.
我在這附近掉了門鑰匙。