tread tractor

例句：

1. 1. The farmer treads his plow through the fields every morning.
   农民每天早上都踩着犁头走过田野。
2. 2. She treads lightly on the ground as she walks.
   她走路时轻轻地踏在地面上。
3. 3. The soldiers treaded carefully to avoid making noise.
   士兵们小心翼翼地走着，以免发出声音。