n the roaring sound made by a motor that is running at high speedv make a loud, roaring sound, as of a car engine, while moving
n. （赛车等加大油门高速行驶时发出的）呜呜声( vroom的名词复数 )v. （赛车等加大油门高速行驶时发出的）呜呜声( vroom的第三人称单数 )