The Expedition 3 crew of the International Space Station caught a rare glimpse of the massive ice fields and glaciers of Patagonia early in the afternoon on September 25, 2001

2001年9月25日中午过后，国际空间站“远征者3号”的全体工作人员看到了罕见的一幕：巴塔哥尼亚巨大的冰原和冰川地带。

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What does the underlined word "expedition" in Paragraph 3 mean?

第三段中划线的单词 “expedition” 是什么意思？

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Late on the morning of April 3, the expedition ship Alucia rocked violently on the South Atlantic Ocean in the middle of a squall.

2011年4月3日清晨，“阿卢西亚号”勘探船在南大西洋的暴风中剧烈的颠簸。

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Chronic hypobaric hypoxia (lack of oxygen): where the expedition will encounter equivalent altitudes up around 3, 800m due to the extreme cold temperatures and distance from the Equator which further decreases atmospheric pressure.

BBC: Viewpoint: The last great polar challenge

The rest of the team will continue with their 2, 000-mile (3, 219km) trek as part of the "Coldest Journey" expedition as they aim to become the first people in history to cross the Antarctic in winter.

BBC: Ranulph Fiennes evacuated from Antarctic base