tractor

1. N-COUNT A tractor is a farm vehicle that is used to pull farm machinery. 拖拉机

2. N-COUNT A tractor is a short vehicle with a powerful engine and a driver's cab. It is used to pull a trailer, such as in a tractor-trailer. 牵引车头

The truck was an 18-wheeler with a white tractor. 这辆卡车有18轮，还有一个白色牵引车头。