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