Another arctic blast is about to turn the Midwestern US into an icebox.

美国中西部区即将遭受另股极寒流的侵袭，气温将大幅下降。

The only way to be in the polar vortex is to be in an airplane.

在极中的唯方法就是乘坐飞机。

It wasn't available to earlier polar explorers, whose diet was commonly insufficient for their health.

早期的极探索者无法使用种方式，他们的饮食普遍对身体不好。

There's this thing called the polar vortex we've told you about before.

是我曾经在节目中提到过的极旋。

Here are polar caps in sunbake deserts, giant volcanoes , mighty canyons.

里有沙漠的极沙帽, 巨大的火山、神秘的峡谷。

Sea levels will rise as ice around the Earth's poles continues to melt.

极冰川的持续融化会使海平面升高。

I was on the Mars Polar Lander team in 1999.

我在1999年的火星极着陆者计划。

So a huge success would vindicate all those years leading to Polar Lander.

所以巨大的成功可以些年极着陆者失败的苦闷。

At some point in this sequence, the earlier Mars Polar Lander failed and crashed.

在串事件的某处，早先的火星极着陆者失败并坠毁。

Modern animals that migrate to polar climes, notably birds, do often breed there.

迁徙到极的现代动物，特别是鸟类，通常会在那里繁殖。

Young polar cod are pelagic, meaning they live at or near the surface.

年幼的极鲟鱼是海洋生物，也就是说他们生活在或者接近海平面。

He is a professor of polar science and environmental geophysics at Newcastle University in England.

他是英国纽卡斯尔大学的极科学和环境球物理学教授。

The melting of polar ice shelves has scientist worrying about rising sea levels.

极冰架的融化让科学家担心海平面上升。

This year, temperatures in the polar area have been especially intense.

今年，极区的温度直在急剧升高。

But the polar vortex did not have the same effect everywhere.

但是次极旋在各的影响并不相同。

Leshin worked on the Mars polar lander that crashed in 1999.

莱欣曾参与了1999年坠毁的火星极着陆器的工作。

Won Young Lee is a biologist at the Korean Polar Research Institute.

李元英是韩国极研究所的生物学家。

We will need to assimilate into globally diverse societies, living in new, polar cities.

我们居住在全新的极城市，需要融入全球多元化的社会。

Those are some big words on mountains or near the poles.

那些是在山脉或靠近极的大词。

As the polar ice caps melt, ocean levels will rise.

随着极冰层的融化，海平面将上升。