1. It was the middle of winter.Snow lay thick on the ground.
    当时，正值隆冬季节.厚雪铺盖着大地。

2. It ´flies´, therefore, but it cannot fly higher----its action depends on the surface, water or ground, over which it rides.
    这样，船就能飞了，但飞不高。它的飞行限决于它所悬浮的水面或地面。

3. It was the middle of winter. Snow lay thick on the ground.
    此时正值隆冬季节，地上积着厚厚的雪。

4. It is in the soil, the ground that grows the food.
    土壤，生长食物的土地里都有水。