B-b fraction
[化] 丁烷-丁烯馏分
🧩 词语组成解析
🗣️ 情景例句
A murder occurred last night in this very district.
就在这个区昨晚发生了一起凶杀案。
I was thirty on my last birthday.
我在我最后一个生日时30了。
The doctor found that there was something wrong with James' eyes.
医生发现詹姆斯的眼睛有毛病。