Forepump
前置真空泵, 预抽真空泵
🗣️ 情景例句
He loves Susan.
他喜欢Susan。
Do you ever do exercises on Saturday?
你曾经在星期六做练习吗？
My shoe has been pressing against my foot, so it hurts a bit.
我的鞋一直挤着脚，所以脚有点疼。