idling 

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英汉解释

n. 空载；空运转

同义词

n. idleness，loafing

参考例句

1. He hated to be idling his time away like that.
他非常不喜欢把时间这样白白混过去。
2. The man who thinks to get on by mere smartness and by idling meets failure at last.
妄想凭借小聪明和终日无所事事就能取的成功的人最终会遭遇失败。
3. And meanwhile, the fast and smooth flow of traffic reduces the air pollution caused by engine-idling.
同时，快速而又流畅的车辆还会减少由发动机怠速导致的空气污染。

英英解释

n.
  1. having no employment

网络释义

idling
空转; 怠速; 空运转; 空转,无负荷运转,惰速运转;
idling speed
怠速转速; 空转速度; 无负荷转速; 空转转速;
idling loss
空载损失; 闲置损失; 空转损耗; 空转损失;
Idling Stop
无空转; 怠速熄火;
idling adjustment
空转调整; 无效调整; 闲置调整; 空转调节装置;