Correct
空转
/ kōng zhuǎi /
Strokes
Definition
idling
Example
As a Verb
(of a motor, etc) idle; race
1
Jīqì
机器
kōng
空
zhuǎi
转
zhāo
着
。
The machine runs idly.
2
Kōngzhuàn
空转
sùdù
速度
idling speed
3
Ràng
让
mǎdá
马达
kōngzhuǎi
空转
idle down the motor
As a Verb
(of a wheel) turn without moving forward; spin