劍橋詞典a system in which a vehicle's engine supplies power to all its wheels instead of just to two, so that the vehicle can travel over very rough ground , or a vehicle that uses this system 四輪驅動系統(tǒng)；四輪驅動車輛（前后四個車輪均有動力，即使在惡劣路面上也可行駛自如） 比較four-wheel drive 返回 all-wheel drive