Pbb
abbr. 多溴联苯（polybrominated biphenyl）
🗣️ 情景例句
Oh, it's so exciting, isn't it, Richard?
噢 ，这太令人兴奋了 ，是不是 ，Richard？
I hope you understand.
我希望你了解。
I could hardly speak.
我简直说不出话来。