冰雪世界 18-英语听力

[00:01.174]In these new surroundings he is a surprisingly adept swimmer.
在这个新的环境里，它的游泳本领令人吃惊 [00:08.039]Once an extremely rare sight
曾有一次罕见的景象 [00:10.885]polar bears have recently been seen over 60 miles from the shore.
最近人们看到北极熊甚至会游到离海岸60英里（1英里约等于1609米） [00:16.960]There is now no turning back for this bear.
这只北极熊不可能再返回了 [00:21.660]He's forced to head out into deeper water.
它不得不游向更远的水域， [00:26.244]His giant front paws help him to fight the ocean currents.
巨大的前爪可以使它逆流前进 [00:31.763]He seems at home in the sea
它看起来在海里游刃有余 [00:34.530]but he cannot swim indefinitely.
但它不能一直不停地游下去 [00:37.788]He will drown if he doesn't find land somewhere in this vast ocean.
如果在这片巨大的海洋里，找不到一片陆地，它最终会溺水而亡 [00:45.768]Walruses are now gathering on low lying islands.
海象在低洼的岛上聚集 [00:49.866]They gave birth on sea ice
它们在冰上生下小海象 [00:52.374]but with this platform now gone,
但现在冰没有了 [00:54.290]they need a new place to haul out and nurse their young.
它们需要有新的地方来把孩子养大