tractor trailer
柯林斯词典
1. N-COUNT A tractor-trailer is a large truck that is made in two separate sections, a tractor and a trailer, which are joined together by metal bars. 牵引式挂车[美国英语]
Driving a tractor-trailer is not an easy job. 驾驶一辆牵引式挂车不是一项容易的工作。
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