Forepump
前置真空泵, 预抽真空泵
🗣️ 情景例句
The food is delicious.
菜好吃极了。
It is my pleasure to introduce the keynote speaker for today.
我很荣幸地介绍今天的主讲人。
They had rough weather, and Kunta's back bled from rolling over on the hard wooden boards.
他们经历了恶劣的天气，孔塔的背部由于在硬木板上滚动而流了血。