polar是什么意思？

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.

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.

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

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

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.

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

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.

The prices of polar expeditions

Some polar animals will soon become extinct.

How polar ice impacts global weather

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.

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

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.