Piston-engines
(piston-engine 的复数) [机] 活塞发动机
🧩 词语组成解析
piston
['pɪstən]
n. <机>活塞;
n. 火车头；发动机, 引擎（engine的复数形式）
🗣️ 情景例句
you need to work at it, Grandpa.
你得常练它， 爷爷。
As a man lives so shall he die.
有生必有死。
He was obviously very nervous and for some minutes stood awkwardly before the microphone.
他显然非常紧张，局促不安地在麦克风前站了好几分钟。