Nowadays, container semi-trailertruck, as the major tool in road transportation, plays an increasingly important role.
集装箱运输货车作为公路运输的主要工具，发挥着越来越重要的作用。
2
A trailer was attached to the rear of the truck.
卡车后面挂了一辆拖车。
《牛津词典》
3
In many areas of the American West he still rides a horse, though he may carry it in a horse trailer behind his pickup truck to the point where the road gives out and a horse becomes indispensable.