B-b fraction
[化] 丁烷-丁烯馏分
🧩 词语组成解析
🗣️ 情景例句
It was our pleasure.
不胜荣幸。
My car could win in a race against her junky car any day!
我的新车在任何一天去赛车，都能赢过她的旧汽车的。
Since then, they have been trying to find out how the fire began.
从那时起，他们一直试图找出起火的原因。