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
May I please speak to Ling Ling?
我可以和玲玲讲话吗？
I've already read that book.
我已经读了那本书。
Tie a heavy weight at the end of a long piece of string.
把一个重物拴在一根长绳子的一端，