accelerator [ækˈsɛləˌretɚ]

例句:

• He pressed down the accelerator pedal of his car.
  他踩下汽车的加速器踏板。
  来自《权威词典》
• The engine stalled. He pressed the accelerator hard.
  发动机熄火了。他用力踩油门。
  
• Gamma rays let astronomers glimpse the particle accelerator's heart.
  来自MSN
• He eased his foot off the accelerator.
  他慢慢松开油门。
  
• The specialists who do it are called accelerator physicists.
  来自SA
• It's a particle accelerator to get information out there.
  来自WSJ