牵引车

例句：

1. 1.The farmer used a tractor to pull the heavy load.
   农民用拖拉机拉重物。
2. 2.The tractor was old and needed repairs.
   那辆拖拉机旧了，需要修理。
3. 3. The tractor is essential for farm work.
   拖拉机对于农场工作至关重要。