trailer truck
noun /ˈtreɪlə trʌk/
  /ˈtreɪlər trʌk/
 (also tractor-trailer)
 (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 trailer truck can turn corners more easily. 挂车:一辆大型卡车,有两个部分,一个在前面,驾驶员坐在那里,另一个在后面,用于搬运货物。这些部分通过挠性接头连接,因此挂车可以更轻松地转弯。