tugger

例句：

1. 1. The tractor pulls the heavy load across the field.
   拖拉机将沉重的货物拉过田野。
2. 2. The trailer is loaded with supplies for the camping trip.
   拖车载满了为露营旅行准备的物品。
3. 3. The towboat was used to rescue the boat that capsized in the storm.
   救生艇被用来救援在暴风雨中翻覆的船只。