B-b fraction
[化] 丁烷-丁烯馏分
🧩 词语组成解析
🗣️ 情景例句
The rest of our family went to the movies.
我们家其余的人都去看电影了。
Fear not the future; weep not for the past.
不要为未来担忧，不要为过去悲泣。
It was the idea of supporting a craft on a 'pad',or cushion, of low-pressure air, ringed with a curtain of higher pressure air.
用一个气垫来支撑船体，低压空或软垫，软垫周围用高压空气环绕。