| 释义 |
piston/ˈpist(ə)n/n. 1 a disc or short cylinder fitting closely within a tube in which it moves up and down against a liquid or gas, used in an internal-combustion engine to derive motion, or in a pump to impart motion 活塞 2 a sliding valve in a trumpet etc. (喇叭等上的)活塞阀键 [French from Italian pistone, variant of pestone, augmentative of pestello PESTLE] |