英语听力：自然百科 大迁徙 Great Migrations—14
时间：2014-05-21 08:02:19
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（单词翻译）
Many will drown in their frenzy1 to launch their eggs seaward. Most years, only a handful of their offspring survive. But sometimes, if wind and sea and luck are with them, a tidal wave of tiny crablings will return to these shores. There is no way to predict if this will be the year of crab2.
Far out in the Atlantic Ocean, a
cacophony3 of clicks announces return of titans. Mother and
calf4 listen intently. Only she knows what these clicks mean. The males have arrived, stupendous, battle-scarred bulls. Back from
epic5 wanderings, the oldest may be 70 years old and have traveled 60 times the
circumference6 of the earth. Most of the time,
utterly7 alone. Now gentle greetings take place. The whales seem to
revel8 in displays of affection. Young males bounce sounds off each other, sizing up the competition in more ways than one. The curious calf joins in.
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