| piston | |
| 级别 | 第7级 |
| 音标 | [ ˈpɪstən ] |
| 解释 | n.活塞 |
| 英英释义 | a short solid piece of metal which moves up and down inside a cylinder in an engine to press the fuel into a small space and to send the power produced by it to the wheels |
| 发音 |  |
| 例句 |
1. They use a piston engine instead. 他们改用活塞发动机。 2. The piston moves by steam pressure. 活塞在蒸汽压力下运动。 |
