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  • 英语听力:自然百科 北极熊 冰上间谍 Spy_Bear—10

    Every hunt presents a different challenge, so he plans a new strategy each time. He slinks into the water, using a channel between the ice floes to act as cover. He swims, hardly making a sound, reaching six miles per hour at times. His front legs pr...

  • 英语听力:自然百科 北极熊 冰上间谍 Spy_Bear—9

    Its seaweed. Kelp is not wildly exciting, but it does contain carbohydrates and some protein too. The cub must find acrobatics rather strange. Hungry bears eat virtually anything. Its a question of making the most of whats around, and its never too s...

  • 英语听力:自然百科 北极熊 冰上间谍 Spy_Bear—8

    This new and ever-changing world requires a different spy-camera, iceberg-cam. It effortless steers between ice sheets and its turret rotates to follow the bears. The bear's lives are now governed by the state of the drifting ice and the movement of...

  • 英语听力:自然百科 北极熊 冰上间谍 Spy_Bear—7

    She leaves little behind. Males are still on the lookout for females. For her cub's safety, she heads back to the hills. But as spring continues, lengthening days bring sudden and dramatic change. The highest tides of the year combine with the rising...

  • 英语听力:自然百科 北极熊 冰上间谍 Spy_Bear—6

    But again, a bear helps with the filming. Sealed with a kiss, the couples whirlwind romance will last three weeks. Out on the frozen sea, a young male has killed a seal. He caught it when it surfaced through a breathing hole in the ice. To film from...

  • 英语听力:自然百科 北极熊 冰上间谍 Spy_Bear—5

    She's aware of his difficulties and uses her body as a shield. She must stay attentive if her cub is to survive in this harsh Arctic world. Realizing he's exhausted, she digs a hollow to rest him. In the dens like this, she suckles him six times a da...

  • 英语听力:自然百科 北极熊 冰上间谍 Spy_Bear—4

    But polar bear courtship is never straightforward. She likes to play hard-to-get. It's also a challenge for blizzardcam. She's testing his fitness, making sure he is a good catch. He skills on the slopes show room for improvement. And now, the female...

  • 英语听力:自然百科 北极熊 冰上间谍 Spy_Bear—3

    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 examp...

  • 英语听力:自然百科 北极熊 冰上间谍 Spy_Bear—2

    She pushes the camera down the slope, a tracking shot. As she films, there is no human presence of any kind. She even adjusts the camera to record her own exit. She must get her cub to the sea-ice before it breaks up and thaws, otherwise, they will b...

  • 英语听力:自然百科 北极熊 冰上间谍 Spy_Bear—1

    The islands of Svalbard in Arctic Norway. They might be remote, but they are under surveillance. Spy cameras are capturing the most intimate images ever taken of polar bears. They're revealing some remarkable behavior and discovering an animal of sur...

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