VDF

例句：

1. 1. The weather forecast for this weekend is predicting a VDF.
   这个周末的天气预报预测将会有一场非常严重的严寒。
2. 2. Due to the VDF, we will not be able to hold the meeting today.
   由于非常严重的严寒，我们今天无法举行会议。
3. 3. The shortage of food has led to a VDF in some regions.
   某些地区的粮食短缺导致了非常严重的食品供应不足。