trailer
noun [ C ] uk/ˈtreɪ.lər/ us/ˈtreɪ.lɚ/
(VEHICLE)
拖车；挂车
a box on wheels that is pulled by a car and is used for taking things from one place to another
The car was pulling a trailer with a motorcycle on it. 这辆汽车拖着一辆挂车，挂车上面载着一辆摩托车。
（大卡车的）挂车
the separate back part of a large truck
US (also travel trailer); (UK caravan)旅行拖车
a wheeled vehicle for living or travelling in, especially for holidays, that contains beds and cooking equipment and can be pulled by a car
(ADVERTISEMENT)
（影视节目、广播的）预告片
an advertisement for a film or a television or radio programme, consisting of short parts taken from it
I saw a trailer for the new series of "Game of Thrones" last night. 我昨晚看了新一季《权力的游戏》的预告片。