The truck came to rest against a tree, its engineracing.
卡车靠着一棵树停了下来，引擎空转着。
《牛津词典》
2
The driver waited for the green light, his engineracing.
那司机等候绿灯放行，让发动机空转著。
3
Combining a rocket, a jet and a racing-car engine into one vehicle is engineering of an extreme sort, but record-breaking often demands that new problems be solved.