As winter approaches in Alaska,
阿拉斯加逐漸進入冬季
food gets progressively harder to find.
食物越來越難取得
To live here is to walk a tightrope.
在這里生活像在走鋼索
Yet every year, this coast attracts North America's most impressive hunter.
但每年這片海岸 都吸引北美最強悍的獵人
A brown bear.
這是一只棕熊
Here they grow larger than anywhere in the world.
這里的棕熊體型 比世上其他地方都大
Other bears have also gathered at the edge of the surf.
其他的熊也在海岸聚集
They've come here to fatten up for the winter.
它們來這里為冬季儲備脂肪
They're waiting for an event that happens just once a year.
它們正在等候一年一度的盛事
The salmon run.
那就是鮭魚回流
Others will tackle the fish upriver, but here in the sea,
其他掠食動物會在河流上游捕魚 但在海邊
these bears have the first chance.
棕熊可以搶占先機