ashed or mulch

例句：

1. 1. The fire was so fierce that it could not be extinguished.
   火势太猛了，无法扑灭。
2. 2. The old tree had been burned down by the fire.
   老树被大火烧毁了。
3. 3. The ashes of the fire are scattered around the area.
   火灾的灰烬散落在周围地区。
4. 1. We used mulch to cover the soil in the garden.
   我们在花园里用覆盖物覆盖土壤。
5. 2. The farmer spread mulch on the ground to prevent weed growth.
   农民在地面上铺上覆盖物以防止杂草生长。
6. 3. The mulch helps to retain moisture in the soil.
   覆盖物有助于保持土壤中的水分。