Definition

Examples

• 汽车发动机的活塞需要定期检查。
  Qìchē fādòngjī de huó sāi xūyào dìngqí jiǎnchá.
  The piston of a car engine needs regular inspection.
• 这个活塞已经磨损了，需要更换。
  Zhège huó sāi yǐjīng mó sǔn le, xūyào gēnghuàn.
  This piston is already worn out and needs to be replaced.
• 活塞在气缸内上下运动，产生动力。
  huó sāi zài qìgāng nèi shàngxià yùndòng, chǎnshēng dònglì.
  The piston moves up and down inside the cylinder, generating power.