Piston knock
[机] 活塞敲击
🧩 词语组成解析
piston
['pɪstən]
n. <机>活塞;
knock
[nɑk]
n. 短促的敲打（声）;爆震声;敲击声;敲门（或窗等）声;
vi. 猛烈敲击;与某物相撞;撞到了桌子;
vt. （心）怦怦跳;把…撞击成（某种状态）;批评;
🗣️ 情景例句
Oh, thank you!
噢， 谢谢你！
She was always in a rush.
她总是很匆忙。
His parents did not know what was wrong.
他的父母亲不知道他有什么毛病。