商务英语中级口语词汇解析：big-rig

商用大卡车（名词，俚语）

(noun, SLANG) A large commercial truck, usually having eighteen wheels.

EXAMPLE: The narrow road was completely blocked by a big-rig that had collided with a bus.

一辆商用大卡车与一辆公交车相撞，狭窄的道路被彻底阻塞了。