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
you know how Dad is always talking about
知道爸爸时常谈起
What time is the mail delivered on Saturday?
邮件在星期六什么时间被递送？
The stronger the will, the more futile the task.
这种意志越是强烈，这种尝试越是徒劳。