天氣好冷啊！寒流 cold stream

冬季常見氣象之一，高緯度的冷空氣向低緯度侵襲，造成大範圍的急遽降溫。

hand warmer 暖暖包
cold [kold] 感冒
cold air mass 冷氣團

Half fruit crop froze out in the severe cold stream.

The cold stream is gone at last long.