accelerator
英 [?k'sel?re?t?]
美[?k's?l?'ret?]
- n. 油門(mén)；催化劑；[機(jī)] 加速裝置
英英釋意
- 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