Winter in this area is extremely cold. The temperature often drops to sixty degrees below zero Celsius.

这一地区的冬天非常寒冷，气温经常会降到零下六十摄氏度。

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For Britons, who are wont to label any temperature the wrong side of zero "Siberian", the difference between cold and even colder might seem intangible.

对英国人来说，他们不会把零下的温度挂上“西伯利亚”的标签，冷和更冷的区别似乎界线不是很清楚。

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It was rather cold that day, five below zero.

那天天气很冷，零下五度。

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As T2 goes to zero, the cold reservoir, then this goes to zero and our efficiency approaches one.

是当T2达到零，也就是低温热源，达到零度的时候,效率可以达到一。

麻省理工公开课 - 热力学与动力学课程节选

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