semitrailer
noun [ C ] US uk/ˈsem.iˌtreɪ.lər/ us/ˈsem.iˌtreɪ.lɚ/
半拖车,挂车
a large, box-like container with wheels at the back that is pulled along by a strong truck
a semitrailer truck (= a truck with a semitrailer) 挂着半拖车的卡车
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