英语听力：自然百科 大迁徙之繁衍生息 Need to Breed—5
时间：2014-05-27 08:04:03
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（单词翻译）
Blood runs freely from slashed1 noses and necks. They even fight dirty, going for the eyes.
The loser's breeding chances for now are ground into the sand. But this beachmaster's triumph is just the beginning of his troubles. Ahead lie dozens of fights and perhaps a hundred matings all for the sake of his bloodline. They need to pass on one's
genetic2 legacy3 is a great motivator of
migrations4.
Nothing else could drive the
nomads5 of the Falklands to tolerate life on land. Nothing else could make migrating mothers stand up to great
predators6 or to drive potential fathers to travel great distances to deadly battlefields.
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