car·a·van /ˈkærəˌvæn/
  旅行隊,有篷頂的大車
  Car·a·van n.
  1. A company of travelers, pilgrims, or merchants, organized and equipped for a long journey, or marching or traveling together, esp. through deserts and countries infested by robbers or hostile tribes, as in Asia or Africa.
  2. A large, covered wagon, or a train of such wagons, for conveying wild beasts, etc., for exhibition; an itinerant show, as of wild beasts.
  3. A covered vehicle for carrying passengers or for moving furniture, etc.; -- sometimes shorted into van.
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  caravan
       n 1: a procession (of wagons or mules or camels) traveling
            together in single file; "we were part of a caravan of
            almost a thousand camels"; "they joined the wagon train
            for safety" [syn: train, wagon train]
       2: a camper equipped with living quarters [syn: van]