Vacuum diffusion pump
[化] 真空扩散泵
🧩 词语组成解析
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
I just don't know what to say.
我真不知该说什么好。
What are you doing?
你正在做什么？
They look around ,but Li Mei did not wait for their thanks.
他们看看周围--但刘梅没有等他们感谢就走了。