1.
Don't race the engine.
不要让发动机空转。
2.
Don't race your engine, ie make it run fast when not in gear.
不要让发动机空转.
3.
The driver waited for the green light, his engine racing.
那司机等候绿灯放行, 让发动机空转着.
4.
The driver wait for the green light, his engine racing.
那司机等候绿灯放行, 让发动机空转著。
5.
He is not a good driver and often idles the enginge down.
他不是个好司机，常常让发动机空转。
6.
The car engine has been idling away for several minutes.
汽车的发动机空转了几分钟。
7.
The car engine has been idling away for a long time
汽车发动机空转了好长时间了。
8.
I stopped the car but left the motor ticking over.
我停住汽车, 让发动机空转.
9.
The car engine has been idling away for several minutes to get it warm.
汽车的发动机空转了几分钟，
10.
I stop the car but leave the motor ticking over
我停住汽车, 让发动机空转
11.
We heard the sound of an engine idling.
我们听到发动机空转的声音。
12.
rotary air engine
旋转式热空气发动机
13.
The car's engine is ticking over.
那辆汽车的发动机正在空转着。
14.
The car's engine was ticking over.
汽车发动机在低速空转着。
15.
The motor engine raced before it was shut off.
汽车发动机关闭之前快速空转。
16.
The engine runs quietly at idle.
这发动机在空转（怠速）的时候非常安静。
17.
Analysis of Aeroengine Rotor-stator Rub-impact Fault in Flight-test
航空发动机试飞转-静子碰摩故障分析
18.
Studying Frequency Veering Characteristics of Aircraft Engine Blade with Beam Function Combination Method
航空发动机叶片“频率转向”特性研究