Pbb
abbr. 多溴联苯（polybrominated biphenyl）
🗣️ 情景例句
Very well.
很好。
With pleasure.
乐意帮忙。
Ships may be delayed by storms; flights may be cancelled because of bad weather, but trains must be on time.
轮船船期可能因风暴而推延，飞机航班可能因恶劣天气而取消，唯有火车必然是准点的。