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- It is very hard under foot when the ground is frozen hard. 土地结冻时，地面非常坚硬。
- The ground is frozen hard. 地面冻硬了。
- It is difficult to dig the grind when it is frozen hard . 当地面冻硬时，不易挖掘。
- It is difficult to dig the ground when it is frozen hard. 地面冻硬时不易挖掘。
- It is difficult to dig the ground when it is frozen hard . 地面冻硬时不易挖掘。
- The weather is cold and the ground is frozen. 天寒地冻。
- It is difficult to dig the grind when it is freezing hard. 当地面冻硬时，不易挖掘。
- The ground is as hard as stone after the drought. 长期乾旱之後土地硬得就像石头一样。
- It is difficult to dig the ground when it is freezing hard. 当地面冻硬时，不易挖掘。
- The ground is shut in by a wire fence. 那块地被铁丝篱笆围住。
- The grind is as hard as stone after the drought. 长期乾旱之後土地硬得就像石头一样。
- The ground is always frozen in winter. 冬天地面总是冰冻的。
- The ground is covered with leaves in the woods. 地上落满了树叶。
- The ground is covered with what? 地面上覆盖着什么?
- The ground is damp in rainy weather. 地面在雨季是潮湿的。
- The ground is too slippery, lets change one. 这个场地太滑,我们换个场子吧。
- The higher the ground is, the thinner air becomes. 离地面越高,空气就越稀薄。
- The snow has frozen hard on the road. 路上的雪已经冻得很硬了。
- It is difficult to dig the ground when it is frozen. 地面冻住了就不易挖掘.
- Spitting on the ground is a bad habit. 随地吐痰是一个坏习惯。
