As the ice disappears, seabirds return to the high Arctic. 冰融化的时候 海鸟返回到北冰洋
Each year, as the climate warms, the Arctic holds less ice. 每年的天气变暖时 北冰洋的冰就会减少
and its rays strike the Arctic more directly. 阳光逐渐直射到北极来
In the Arctic, any breach in the icy barrier can be a lifeline. 在北极 每一处破冰的地方都是一条生命线
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
Every year three million caribou migrate across the Arctic tundra. 每年 300万迁徙的北美驯鹿 都将穿越北极苔原
Further south the winter snows have almost cleared from the Arctic tundra. 在更远的北极苔原上 冬雪几乎已经完全消失