Vacuum preconcentrator
[化] 真空预浓缩器
🧩 词语组成解析
[化] 预浓缩器
🗣️ 情景例句
It makes a tremendous difference to me.
这对我来说差别极大。
What day is tomorrow?
明天是星期几？
There is hope so long as he is with us.
只要他在就有希望。