英语听力：自然百科 北极熊 冰上间谍 Spy_Bear—16
时间：2014-05-22 06:56:25
搜索关注在线英语听力室公众号：tingroom，领取免费英语资料大礼包。
（单词翻译）
But it's not enough. For a hunting bear, it doesn't get much worse than this. The seal could hardly fail to notice. But this battle-hardened seal is in no rush. Finally he gains some purchase, he's back in the game. He still believes he's in with a chance. He can charge at 25 miles per hour. But bears usually wait until they're 30 meters away, this one started at 300. She has all the time in the world to escape. Only the bears unexpected dunking in the ice could explain such an amateur1 performance.
The ice is now so thin. It only supports the weight of
lighter2 cubs3, leaving the mother struggling. This is a sign that the mother must head north to the more permanent icecap as quickly as possible. But a combination of wind and current destroys her best-laid plan. A sudden
swell4 turns ice into open ocean. The cubs are too young to swim long distances safely.
分享到：
Error Warning!
出错了
Error page: /mobile/index.php?aid=259544&mid=3
Error infos: Got error 28 from storage engine
Error sql: select `l`.`tag`,`l`.`index`,`l`.`level_id`,`b`.`id`,`b`.`word`,`b`.`spell`,`b`.`explain`,`b`.`sentence`,`b`.`src` from `new_wordtaglist` `l` left join `new_word_base` `b` on `l`.`tag`=`b`.`word` where `l`.`arc_id`='259544' and `l`.`level_id`>='' group by `b`.`word` order by `l`.`index` asc
