Pistoning
(piston 的现在分词) n. 活塞, 活塞阀键\\n[医] 活塞(如注射器的)
🗣️ 情景例句
Thank you for your reassurance, Dr. Stewart.
谢谢你消除了我疑虑，Stewart大夫。
As long as you like it.
你喜欢就好！
And I'm Polly!
我是波利！