double ace特级飞行员doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double-step MUX跳级复用设备double vee clutch双锥离合器double-barreledadj.双管的(枪)；双筒的(望远镜)double-run feed内槽轮排种器double slab track双块式轨道double tube sides双管程double-contrast双重对比double desk model双层模型double-weighted双权值double-low meal双低菜粕