英语听力：自然百科 冰冻星球 前往地球尽头—4
时间：2014-05-28 06:18:39
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（单词翻译）
Few have witnessed this moment, for the male, his only tender encounter in an otherwise solitary1 life.
But it doesn't last long. A rival suitor has also caught the female's scent2.
Courtship has to be put on hold. He must fight for his rights.
He sees off this first challenger without injury to either party, but
bloodier3 battles are to come.
Another battle won, though he has been slightly injured. He hurries back to his mate, but now she seems to have lost her enthusiasm. Female polar bears are high maintenance.
Wherever she goes, he will follow, mating with her when she allows and guarding her at all times. Over the next two weeks, the male sees off many rivals, but the battles take their
toll4 on him.
He is almost spent, but he has ensured that no other bears have mated with his female.
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