Pbb
abbr. 多溴联苯（polybrominated biphenyl）
🗣️ 情景例句
Go by the book.
照章办事。
Speech shows what a man is.
言如其人。
He prepared the speech carefully and went to the wedding with Jenny.
他认真准备了讲稿，带着珍妮一道去参加了婚礼。