Forepump
前置真空泵, 预抽真空泵
🗣️ 情景例句
I don't want to interrupt her school year.
我不愿意打断她这个学年。
Oaks may fall when reeds stand the storm.
树大招风。
Will you travel by sea or air?
你们乘船去，还是乘飞机去？