tractor-trailer
noun/ˈtræktə treɪlə(r)/
/ˈtræktər treɪlər/
(also trailer truck)
(North American English)- a large truck with two sections, one in front where the driver sits and one behind for carrying goods. The sections are connected by a flexible joint so that the tractor-trailer can turn corners more easily.
enlarge image牵引式挂车；铰接式卡车；载重拖车