tread drive dental engine

例句：

1. 1. The man was walking on the treads of his old shoes.
   这个人穿着旧鞋在地板上走。
2. 2. The horse trotted across the field.
   马小跑穿过田野。
3. 3. She walked on the treads of her shoes to avoid slipping.
   她踩着鞋子的底部以避免滑倒。