N-VAR
霜;霜凍;嚴寒天氣
When there is frost or a frost, the temperature outside falls below freezing point and the ground becomes covered in ice crystals.
例句
There is frost on the ground and snow is forecast...
地上結霜了，而且預報說會有雪。
The wind had veered to north, bringing clear skies and a keen frost.
風向已經轉北，帶來了晴朗的天空和嚴重的霜凍。