Circular piston
[电] 圆活塞
🧩 词语组成解析
piston
['pɪstən]
n. <机>活塞;
🗣️ 情景例句
For a year or two
在一两年内
He hasn't done any worthwhile work in five years.
这五年来他没做过一件正经事。
Doctor, I'm not feeling well, she said. I often feel tired.
“医生，我感到不舒服，”她说，“我经常感到疲倦”。