B-b fraction
[化] 丁烷-丁烯馏分
🧩 词语组成解析
🗣️ 情景例句
I'll be back to see the game.
我到时候来看比赛。
Clearly their victory is out of the question.
很显然，他们是不可能获胜的。
The wall has ears.
隔墙有耳。