“空转”怎么读

在树林的那一边，一架小飞机停在那里，发动机在空转。Beyond a stand of trees a small plane idled.她的戴姆勒豪华轿车原地待命，发动机在空转。Her Daimler limo waits with its engine idling.不要让发动机空转.Don't race the engine....

“空转”的英语可以翻译为：idling，racing，turn without moving forward，spin ...