对于海上钻探，北极的水域特别危险，因为极端寒冷，长时间的黑暗，密雾，以及飓风强度的大风。
The waters of the Arctic are particularly perilous for drilling because of the extreme cold, long periods of darkness, dense fogs and hurricane-strength winds.
这一罕见的自然现象叫做雾虹，是由山姆-杜布森在最近的一次北极探险中拍摄到的。
The rare phenomena, named a fog bow, was spotted by Sam Dobson during a recent expedition to the North Pole.
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