frost day

• 霜日

frost day的用法和样例：

例句

1. The winter and early spring temperatures at De Hoge Veluwe have increased in recent decades, although there has been no change in frost days.
   近数十年来，尽管侯格维陆威的霜日天数没有变化，但冬天和初春的温度已经上升。