Reciprocating vacuum pump
[化] 往复式真空泵
🧩 词语组成解析
[医] 交互的, 往复的
pump
[pʌmp]
n. 抽水机;打气筒;泵;轻软舞鞋;
v. 用泵输送 ;涌出;急速摇晃;盘问;
🗣️ 情景例句
Did they write some bad news?
他们写了什么坏消息吗？
I'm the oldest person in my club.
我是我的俱乐部中最老的人。
No, I need to talk to the home office.
不，我得先跟总公司谈谈。