• 今朝は零下5度でした
    • It was five degrees below zero (Celsius) this morning./The temperature was minus five degrees (Celsius) this morning.
    • 温度は零下10度に下がった
    • The temperature went down to ten degrees below freezing [〔摂氏〕 zero].
    • 池は零下になると凍る
    • The pond freezes in subzero temperatures.