Pbb
abbr. 多溴联苯（polybrominated biphenyl）
🗣️ 情景例句
and you care about me
和我
He that is full of himself is very empty.
自满的人是很空虚的。
where chance discoveries play a much larger part than they do in physical and mechancal industries.
同物理和机械工业相比，化学工业中偶然发现的机会要多得多。