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After three months of winter darkness, the sun rises across arctic Norway.
在三個月的黑暗寒冬后，太陽橫跨北極挪威升起。
A newly emerged polar bear mother encourages her cubs to take their first tentative steps on the sea ice.
初來乍到的北極熊母親鼓勵它的幼熊在海冰上嘗試踏出第一步。
Cubs will stay with their mothers for two years, learning the skills needed to survive out here.
幼熊會待在母親身邊兩年，學習在外面生存所需的技能。
But thereafter, they will be on their own.
但在分離后，它們就得自食其力。
Further out on the sea ice, this young female bear, less than six years old, is already fully independent.
在海冰更外面的地方，這只年輕母熊還不滿六歲，卻已經完全獨立。
She's superbly adapted to life on the frozen ocean,
它絕佳地適應了冰凍海洋上的生活，
protected from the cold by thick, insulating fat and a double layer of fur.
被御寒脂肪與雙層皮毛保護，隔絕寒冷。
This time of year is the best time for feeding.
這是一年之中進食的最佳時機。
The ringed seals on which she depends feed on fish, and are swimming 40 metres beneath her.
雌性北極熊以環斑海豹為食，環斑海豹則以魚為食，并在它下方四十米游泳。
But after ten minutes down there, they must return to the few gaps in the ice to take a breath and rest.
但在下面待了十分鐘后，它們必須回到冰上的幾個裂縫呼吸、休息。
She has acute hearing and one of the most sensitive noses in nature.
它的聽覺靈敏，而且擁有大自然中最敏感的鼻子之一。
She can detect a seal's lair beneath two metres of snow and ice.
它能偵測到冰雪兩米底下的海豹窩。
Timing is everything.
一切都取決于時機。
