英语听力：自然百科 北极熊 冰上间谍 Spy_Bear—3（在线收听） |
She blinks in the sunlight. She spent her confinement in semi-darkness. She checks that the coast is clear and then reveals her secrets. Time for a stretch. She's been cooped up with her cubs since she gave birth three months ago. They learn by example, but the first lesson seems to be about snowballs. When she leaves, she expects them to follow. But the first steps are always the most difficult to take. A frozen sea now surrounds the islands. It stretches all the way to the North Pole. It is out on this ice that most polar bears spend their lives. But in spring, males return to land to search for females. Males may be a risk to cubs, but this one is otherwise engaged. He's found a lone female. |
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