ground photograph

例句：

1. 1.The ground is too hard to walk on.
   地面太硬，无法行走。
2. 2. The roots of the tree are firmly planted in the ground.
   这棵树的根深深地扎在土里。
3. 3. The farmer carefully grounds the wheat for flour.
   农民仔细地把小麦磨成面粉。