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
A movie!
电影！
The school is two miles straight ahead.
那学校一直向前两英里。
But there are some parts of the word where even now people cannot write.
但直到现在，世界上有些地方，人们还不会书写。