to upshift
01
换到更高的档位, 升挡
to change to a higher gear in a vehicle to go faster
例子
The driver decided to upshift as he entered the highway.
司机决定在进入高速公路时换高档。
You need to upshift when the engine starts to sound too loud.
当发动机开始听起来太大声时，你需要升档。
