自1月28日以来，美国中西部受到北极寒流影响，气温骤降，气温低至零下18摄氏度。
Since 28th Jan, Midwest region of the US has experienced ‘polar vortex’ which results in a significant drop in temperature to as low as -18 Celsius degree.
在这样的温度下，在室外待几分钟都有可能冻伤。
In this kind of temperature, staying outdoors for even a few minutes could result in frostbites.
受低温影响，学校关门了，飞机停飞了，取暖中心也建起来了。
Due to the low temperature, schools have closed, flights have been cancelled, sheltered have been set up.
尽管如此，因冻伤而去医院的人们络绎不绝，甚至出现了21个死亡者。
Although many attempts have been made, many people have been admitted to hospitals due to frostbites, 21 people have even died in the cold.
这真的是像住在一个用雪做成的洞里一样啊！
It is like living in a cave made out of snow.
一日成语：
冰天雪窖——冰做的天空，雪做的窖。窖是一种储存食物的地洞。这个成语用来形容极度寒冷。
Bīngtiānxuějiào ——sky made out of ice and cave made out of snow. ‘jiào’is a kind of cave in the ground used to store food items. This idiom is used to describe extreme coldness.