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(3): 在阿拉斯加海军部岛冰封的环境中，夏天提供了最短暂的呼{资源屯-ziyuantun.com}。熊和海豹等一年四季的居民都会求助于鲑鱼泛滥的水道来维持生计。与此同时，移民成群结队，从座头鲸到超过1.4亿只海鸟，几乎是北[ZiYuantun.Com]半球鸟类的一半。
