throttle up
phrasal verbthrottle (something) back/down/up 
- to control the supply of fuel or power to an engine in order to reduce/increase the speed of a vehicle
- I throttled back as we approached the runway.
 
 
| 单词 | throttle up | 
| 释义 | throttle upphrasal verbthrottle (something) back/down/up  
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