1. The sheep trod a path through the grass.
   羊群在草地上踩出一条路。
2. We heard his heavy tread on the staircase.
   我们听到了他走在楼梯上沉重的脚步声。
3. Our ancestors trod this same path.
   我们的祖先曾经走过这同一条道路。
4. He trod the room from end to end.
   他在房间中走来走去。
5. They crush the juice out of the fruit by treading it.
   他们把水果踩出汁液来。

　1个形容词解释