CNN News: 冰封美國的極地漩渦

CNN STUDENT NEWS is happy to have you watching this Wednesday. I`m Carl Azuz at the CNN Center.

歡迎大家收看今天的CNN學生新聞。我是卡爾·阿祖茲，在CNN中心為您播報。

Our first story this December 14th -- baby, it`s cold outside. Two-thirds of the United States, the eastern two-thirds, are seeing record-breaking winter temperatures. Some places have recorded their coldest December day ever. What means, this could be one of America`s coldest winters in years.

今天的頭條新聞，是外面的寒冷天氣。2/3的美國，以及2/3的東部地區(qū)，冬天的溫度在刷新低。一些地方表示是有史以來最寒冷的12月。這也就意味著是美國最寒冷的冬天。

From North Dakota to Massachusetts, wind chill temperatures, what the cold feels like when the wind hits you, were expected to be between negative 10 and negative 35 degrees Fahrenheit. That can cause frost bite within minutes on uncovered skin.

從北達科他州到馬薩諸塞州,風寒溫度,寒冷如刺骨的寒風,溫度預計在零下35到零下10華氏度。裸膚狀態(tài)下，數(shù)分鐘就會導致凍傷。

This latest Arctic blast follows a winter storm that struck last week, forcing thousands of airline flight cancellations in the Midwest and it was still coating New England with snow last night. And as this week goes on, U.S. temperatures are expected to get lower. How is this happening?

暴風雪之后，上周最新的極地寒流來臨。這使得美國中西部航空公司被迫取消上萬航班，同時昨天晚上，新英格蘭仍在下雪。而在本周，美國溫度繼續(xù)下降。但是這背后的原因是什么呢?

From the Gulf of Alaska in the Northern Pacific, a strong cold front blew southeast into the country and started frosting its way across America.

從北太平洋的阿拉斯加灣，一股墻寒流從東南部進入美國，并開始冰封整個美國。

When a storm pattern like this hit the U.S. in 2014, meteorologists and the media were using the term "Polar Vortex". What exactly is that?

2014年，美國曾發(fā)生過類似的事件，氣象學家和媒體使用了“極度漩渦”這個術(shù)語。但是，到底什么是極地漩渦呢?