sem.i.trail.er

semitrailer的音标和读音：
DJ音标发音： [ˈsemi:ˌtreilə, ˈsemai-]
KK音标发音： [ˈsɛmiˌtrelɚ, ˈsɛmaɪ-]

semitrailer的词性：
n.（名词）

1. A trailer having a set or several sets of wheels at the rear only, with the forward portion being supported by the truck tractor or towing vehicle.
半挂车：在后部有一套或若干套轮子，前部由牵引车或牵引机动车支撑的挂车