He took part in an expedition to the North Pole.

他加入了一支北极探险队。

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The explorer organized an expedition to the North Pole.

那位考察者组织了一个去北极的探险队。

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Many difficulties attend on their scientific expedition to the North Pole.

他们去北极进行科学考察碰到了许多困难。

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

UNESCO: SHSviews

While Penny did her best to overlook the fact that Leonard had kissed another girl two years ago while he was on his North Sea expedition, she was unable to get past it and thought of the girl who, it turns out, works at the university with Leonard.

CNN: 'Big Bang Theory': Penny and Leonard say 'I do' �� now what?

The new claim in Brazil follows an expedition by scientists which is said to have discovered a new source for the Amazon in the south of Peru and not the north of the country as had been thought for many years.

BBC: NEWS | Americas | Amazon river 'longer than Nile'