of frost

例句：

1. 1. The trees are covered in a thick layer of snow and ice, making it difficult to see the ground beneath.
   树木被厚厚的雪和冰覆盖，很难看到下面的地面。
2. 2. The cold weather has caused the ground to freeze solid, making it impossible to plant crops.
   寒冷的天气使地面冻结成块，无法种植作物。
3. 3.The farmer had to wait until the frost lifted before he could start his harvest.
   农民不得不等到霜融化后才能开始收割。