Forepump
前置真空泵, 预抽真空泵
🗣️ 情景例句
Malcolm, you worked on the Spaceport project?
Malcolm，你曾负责 太空港 的案子？
He that converses not knows nothing.
不和人交谈的人一无所知。
Such is human nature, that a great many people are often willing to sacrifice higher pay for the privilege of becoming white-collar workers.
许多人常常情愿放弃较高的薪水以换取做白领工人的殊荣，此乃人之常情。