Reciprocating pump
[化] 往复泵
🧩 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
He was my roommate in college.
他是我大学时的室友。
Which one is more difficult?
哪一个是比较难的？
No, it's quite near.
不，很近。