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
I see. Is a credit card OK?
我明白了。用信用卡可以吗？
Please be serious for a minute, this is very important.
请严肃点，这件事很重要。
It's always warm in April and May,but it rains sometimes.
4月和5月的天气总暖洋洋的，但有时下雨。