They sighted each pole, reading off measurements that were then used to calculate the change in elevation over each increment.

他们瞄准了每个极点，读出测量值，然后用这些测量值来计算每个增量上的海拔变化。

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Here's how the seasonal change affects the weather: Around the time of the June solstice, the North Pole is tilted toward the sun and the Northern Hemisphere is starting to enjoy summer.

季节是这样影响天气变化的：约在6月份夏至的时候，北极斜向太阳一面，北半球开始享受夏天。

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China's polar expedition ship will go to the North Pole in 2008 to study climate change.

中国极地探险队将于2008年去北极研究气候变化。

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Scientists say the thinning ozone layer over the South Pole makes climate change take place more quickly than in other areas of the world.

VOA: special.2009.06.03

In April 2006, I led an expedition to the North Pole to raise awareness of the consequences of climate change.

UNESCO: SHSviews