defecation mud

例句：

1. 1. The farmer used to use this mud to make his fertilizer.
   这位农民过去用这种泥来制作他的肥料。
2. 2. The scientist found that the mud helped to purify the water.
   科学家发现这种泥有助于净化水。
3. 3. The mud was so thick that it made the wheels sink into the ground.
   这种泥太厚了，以至于车轮都陷进了地里。