throttle /BrEˈθrɒtl; NAmEˈθrɑːtl/ ► SEE ALLthrottle backthrottle up ●ˌthrottle ˈback ( ˌthrottle ˈdownless frequent) to control the supply of fuel or power to an engine in order to reduce the speed of a vehicle调节油门减速◆The pilot got very low before he throttled back. 飞行员减速前高度降得很低。[v + adv]●ˌthrottle ˈup (rare) to control the supply of fuel or power to an engine in order to increase the speed of a vehicle调节油门加速[v + adv]