Piston-engine
[机] 活塞发动机
🧩 词语组成解析
piston
['pɪstən]
n. <机>活塞;
engine
['endʒin]
n. 发动机，引擎;工具;火车头;机车;
vt. 给…安装发动机;
🗣️ 情景例句
I don't understand. Did you exercise or not?
我搞不懂 ，你到底作了健身操没有？
Where have you been all this time?
这段时间你跑到哪里去了？
That'll put us both in the picture.
这样双方都能了解全面的情况。