tick over
柯林斯詞典
1. V (of an engine) to run at low speed with the throttle control closed and the transmission disengaged (發(fā)動機)怠速轉動; 空轉 (See also idle)[英國英語]
2. N the speed of an engine when it is ticking over 空轉速度
3. N (as modifier) 空轉的
tick-over speed
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