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accelerator

英 [ək'seləreɪtə] 美[ək'sɛlə'retɚ]
  • n. 油门;催化剂;[机] 加速装置

英英释意


1. a pedal that controls the throttle valve;
"he stepped on the gas"
2. a valve that regulates the supply of fuel to the engine
3. (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected
4. a scientific instrument that increases the kinetic energy of charged particles