ground arms

例句：

1. 1.The ground was too soft for the heavy boots to walk on.
   地面太软，沉重的靴子无法在上面行走。
2. 2. The ground shook as the earthquake hit.
   地震发生时，地面震动。
3. 3. The scientist used ground-penetrating radar to survey the land.
   科学家使用穿透地雷进行土地勘测。