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There have been half-hearted but well-publicized efforts by some food companies to reduce calories in their processed foods, but the Standard American Diet is still the polar opposite of the healthy, mostly plant-based diet that just about every expert says we should be eating.

出自-2015年12月阅读原文

Normally planes don't go to the polar post from February to October because of the dangers of flying in the pitch-dark and cold.

2019年6月四级真题（第二套）听力 Section A

On Wednesday, a polar wind brought bitter cold to the midwest.

2019年12月四级真题（第二套）阅读 Section B

There have been half-hearted but well-publicized efforts by some food companies to reduce calories in their processed foods, but the Standard American diet is still the polar opposite of the healthy, mostly plant-based diet that just about every expert sa

2015年12月四级真题（第三套）阅读 Section B

Bearded Russian priests offer regular services at the Orthodox church for the 16 or so Russian speakers who spend the winter at the base, largely polar scientists in fields like glaciology and meteorology.

出自-2016年12月阅读原文

Despite mournful polar bears and charts showing carbon emissions soaring, most people find it hard to believe that global warming will affect them personally.

出自-2015年12月阅读原文

We've had more people booking in the first quarter of this year than last," says Hubert Moineau, founder of Tselana Travel, which is planning to introduce a new program of longer adventure trips, including polar expeditions and cruises in the Galápagos.

出自-2011年6月听力原文

The prices of polar expeditions

出自-2011年6月听力原文

Some polar animals will soon become extinct.

出自-2010年12月听力原文

How polar ice impacts global weather

出自-2010年12月听力原文

Among global warming's most frightening threats is the prediction is that the polar ice-caps will melt, raising sea level so much that coastal cities from New York to Los Angles to Shanghai will be flooded.

出自-2010年12月听力原文

As the ocean warms, a body of water called the Antarctic Polar Front - an upward movement of nutrient-rich sea that supports a huge abundance of marine life - is being pushed further south. This means that king penguins, which feed on fish and krill in th

2019年12月六级真题（第三套）阅读 Section C

Satellite observations and submarine surveys over the past few years had shown less ice in the polar region, but the recent measurements show the loss is more pronounced than previously thought.

2016年6月六级真题（第一套）听力 Section C

It is difficult to figure out a global population of polar bears as much of the range has been poorly studied; however, biologists calculate that there are about 20, 000-25, 000 polar bears worldwide.

2019年高考英语全国卷I 语法填空 原文

Modem methods of/for tracking polar bear populations have been employed only since the mid-1980s, and are expensive to perform consistently over a large area.

2019年高考英语全国卷I 语法填空 原文

Of the nineteen recognized polar bear subpopulations, three are declining, six are stable, one is increasing, and nine lack enough data.

2019年高考英语全国卷I 语法填空 原文

The polar bear is found in the Arctic circle and some big land masses as far south as Newfoundland.

2019年高考英语全国卷I 语法填空 原文