The planet was practically covered in ice just a few thousand years ago.

几千年前，地球几乎全部被冰覆盖。

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You see this ground, it's covered in ice.

你看这块地面，它是被冰封住的。

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Much of the northern part of the world was covered in ice.

那时世界北部的大部分地区都被冰雪覆盖。

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About ninety-eight percent of this area is covered in ice.

VOA: special.2009.06.03

Scientists say a little more ice covered the Arctic in September than in September of two thousand eight.

VOA: special.2009.10.27

Many people die in traffic accidents on roads that are covered with snow or ice.

VOA: special.2010.01.05

Most of the snow melted and then froze again, and the ground was covered in ice.

UNESCO: On the frontlines of climate change: Sami reindeer herders

For instance, sea ice is predicted to increasingly shrink as a result of climate change: the late-summer Arctic sea ice may vanish almost entirely by the middle of the century, triggering unprecedented maritime challenges, with an increase in shipping and oil and gas exploration in high-latitude waters previously covered in ice.

UNESCO: Building the Wealth of Nations

It's covered in sea ice a lot of the time and very few people live nearby, so it doesn't get too much attention except from hearty types like climate scientist Max Holmes.

NPR: Arctic Freshwater Pouring Into Atlantic, Scientists Say