The ducks must quickly prise the mussels free before the tide starts to turn. 绒鸭必须赶在潮流转向之前迅速采食
a permanent hole in the sea ice, kept open throughout the winter by strong ocean currents. 冰间湖是结冰的海洋上永久性的洞孔 因为有强大的洋流使它们冬天也不会冰封
They have stayed here, braving the northern winter, 绒鸭没有迁徙到温暖的南方
Flocks 40,000 strong sweep across the frozen wastes. 4万只绒鸭飞越这一片冰天雪地的荒野
They all have the same goal, a polynya, 它们都有相同的目标--冰间湖(冰穴)
the Arctic is a vast frozen sea surrounded by land. 北极是广阔的冰封海洋 被陆地包围
At the northern extreme of our planet, 而在地球的北极
the sun rises for the first time in months, 太阳在数个月的沉寂后第一次升起
The birds at the edge of the huddle bear the brunt of the 100-mile-an-hour winds 处于边缘的企鹅承受着时速100英里的狂风袭击