In the ice-gripped environment of Alaska's Admiralty Island, summer offers the briefest of respites. Year-round residents such as bears and seals turn to the salmon-filled waterways for sustenance. Meanwhile, migrants descend in droves, from humpback whales to over 140 million seabirds--almost half the birds in the Northern Hemisphere. 　　译文(2): 在阿拉斯加阿德默勒尔蒂岛冰雪覆盖的环境中，夏季提供了最短暂的喘息时间。熊和海豹等常年生活在这里的居民转向满是鲑鱼的水道以求生存。与此同时，迁徙者成群结队地下降，从座头鲸到超过1.4亿只海鸟——几乎是北半球鸟类的一半。