v.發(fā)動機(jī)旋轉(zhuǎn);加快速度
n.發(fā)動機(jī)的旋轉(zhuǎn)
Don't rev the engine so hard. 別讓發(fā)動機(jī)轉(zhuǎn)得太快。
If you rev up your engine too fast,you may damage it. 如果你使發(fā)動轉(zhuǎn)速太快,就會把它弄壞的。