The old men had told him that no man should travel alone in the Yukon when the temperature is sixty degrees below zero.

VOA: special.2010.05.01

They form when the air temperature is about fifteen degrees below zero Celsius.

VOA: special.2010.01.05

Some fruits and vegetables must be stored at zero to four degrees Celsius.

VOA: special.2009.11.30

They form when the temperature is about five degrees below zero.

VOA: special.2010.01.05

The temperature often dropped to sixty degrees below zero Celsius.

VOA: special.2009.02.11