英语说文解字caravan
n. （活动房式的）拖车；（供居住用的）有篷马车，大篷车；（一起旅行的）车队
caravan
Yiwu-Madrid! A 13，052-km courier journey of a 'steel caravan'
From Yiwu, the "World's Supermarket," to Madrid, the largest small commodity distribution center in Europe, the Yiwu-Europe freigh