昨晚气温骤降到零下10度。

The temperature dropped to ___subzero 10 degrees last night.

探险队必须穿戴特殊装备才能在零下环境中生存。

The expedition team must wear special gear to survive in ___subzero temperatures.

昨晚气温骤降，达到了零下十度。

The temperature dropped to ___subzero levels last night, reaching minus ten degrees.