n.开路先锋
A trailer was attached to the rear of the truck.
卡车后面挂了一辆拖车。
Before driving away, re-check the trailer coupling.
开走之前，再检查一下拖车的挂钩。
a car towing a trailer with a boat on it
拖着一辆载有小船的拖车的小汽车
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