简介:In the ice-gripped envir在线视频onment of Alaska's Admiralty Island, summer offers the briefest of respites. Year-round 字幕residents such as bears and seals turn to the salmon-中文filled waterways for sustenance. Meanwhile, migrants descend in droves, from humpback whales to over 140 million seabirds--almost half the birds in the Northern Hemisphe欧美re.详情