tractor traction

例句：

1. 1. The farmer used a tractor to pull his heavy load.
   农民用拖拉机拉他的重物。
2. 2. The tractor was equipped with a powerful engine and four wheels.
   这台拖拉机装备了一台强大的发动机和四个轮子。
3. 3. The tractor was used for farming purposes, transporting goods and people.
   这台拖拉机用于农业目的，运输货物和人员。