v.轻松快活地行动；凭惯性前进
An aircraft powered by a conventional propeller and supported in flight by a freewheeling, horizontal rotor that provides lift. 旋翼机在飞行中以常规的螺旋桨来驱动并靠惯性滑行支持的，提供升力的水平旋转仪
adj.无约束的
n.空程
