"idling" in Chinese (Simplified)
空转（发动机）- 闲着（人）
Definition
当一台机器，特别是发动机，运转但没有移动或做工时。也可以指一个人没有积极行动或没有产出。
Usage Notes (Chinese (Simplified))
“Idling”多见于描述发动机（如“发动机空转”），也可形容人无所事事、无生产力。对机器是运转但不运动；对人则有点消极的意味。
Examples
The car was idling at the red light.
汽车在红灯时**空转**。
He spent the afternoon idling and watching TV.
他下午都在**闲着**看电视。
The factory machines were idling during the lunch break.
工厂的机器午休时**空转**。
Sorry I’m late—traffic was a nightmare and I was just idling in my car for ages.
抱歉我迟到了——交通太糟了，我在车里**空转**了很久。
After finishing my work, I found myself idling instead of starting anything new.
完成工作后，我发现自己只是**闲着**，没有开始新事。
"Don’t waste fuel by idling your engine for too long," the mechanic advised.
技师建议：“不要让发动机**空转**太久，浪费油。”