One meter a valley, it is spring, summer, autumn and winter drops of sweat harvest, please cherish!

一米一谷，都是春夏秋冬滴汗水的收获，请珍惜！

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Winter closes in and the temperature drops below freezing.

冬天来临，气温降至冰点以下。

《柯林斯英汉双解大词典》

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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Yura said that in winter, the temperature in Tynda drops to -47C.

BBC: A train to nowhere in Siberia

But in the winter, the number of journeys drop, the speed on the roads also drops, and voila!

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