0 a wheeled vehicle for living or travelling in, especially for holidays, that contains beds and cooking equipment and can be pulled by a car -- (尤指度假时使用,由汽车拖曳的)宿营拖车,旅行拖车
a gypsy caravan 吉普赛人的大篷车
1 a group of people with vehicles or animals who travel together for safety through a dangerous area, especially across a desert on camels -- (尤指骑骆驼穿越沙漠的)旅行队,车队
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
再长的路,一步步也能走完,再短的路,不迈开双脚也无法到达。