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During the months underground,
在地下的數月時間里
all they've known is their mother.
它們只認識自己的母親
Now, the big, wide world holds all sorts of challenges
如今 對于這些勇敢的小小探險家來說
for these brave, young explorers.
廣闊的世界充滿各種挑戰
The mother leads her new family out over the frozen sea
熊媽媽帶領新家庭來到冰凍的海面上
to hunt for seals.
捕獵海豹
But the spring melt is already under way.
但春季的冰雪消融已悄然而至
All across the Arctic, the sun's warming effect is increasing.
在北極 陽光的增溫效應不斷加速
Sea ice is showing the first signs of weakening.
海冰首度出現了融化的跡象
Inland, the northern rivers are still locked in ice.
在內陸地區 北部的河流仍處于冰封期
The frozen waterfalls are like dams,
凍結的瀑布如同大壩一般
holding back billions of tonnes of fresh water
儲備著數十億噸
that has not moved for almost six months.
凍結已近半年的淡水資源
The vast watershed lies motionless.
如此巨大的水庫一直靜臥在那里
But as spring advances,
但隨著春天的臨近
it begins to stir.
它開始騷動起來
The frozen waterfalls start to weaken.
凍結的瀑布逐漸消融
Above them, the pressure is mounting.
上游處的壓力與日俱增
