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
Come on. You all helped.
别这样说。你们都帮了忙。
If she gets mad with him, she will not speak to him for days.
她对他一生气就会许多天不跟他说话。
Excuse me. Where's North Street Hospital, please?
请问，北街医院在哪儿？