In 2007, a Russian expedition descended in a pair of vessels more than two miles under the ice cap and deposited a Russian flag on the seabed at the North Pole.
2007年，一支俄罗斯探险队在北极用两艘潜水器潜到了两英里之下的冰层，并在海底放置了俄罗斯国旗。
He stood up straight with arms folded, and laughed at the cap hanging there on the pole.
他交臂直立，笑看帽子挂在杆子上那个样子。
Mars has water vapour in its atmosphere, and water ice in the shining cap at its North Pole.
火星的大气中有水蒸气，其北极极冠中有水冻冰块。
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