B-b fraction
[化] 丁烷-丁烯馏分
🧩 词语组成解析
🗣️ 情景例句
about your salaries and your savings.
关于薪资和储蓄。
What is it you don't like about winter weather?
你不喜欢冬天什么样的天气？
Before they were replaced by steamships,
在蒸汽船取代帆船之前。