(单词翻译:单击)
The remnants of the sea ice are occupied by sun-bathing seals that have been here all winter. But new arrivals are following the retreating ice edge and they have come here to hunt. Killer whales, the ocean's top predator, killers are like wolves for they will hunt animals far larger than themselves. But even smaller prey are a problem if you can't reach them. The solution is teamwork. Swimming in perfect formation, they flick their tails in unison and create a wave that cracks the ice. They regroup and recess the damage. A more powerful wave is needed. The ice floe is breaking up. Now they are close enough to get a good look at their target. The seal is a crabeater, sharp-toothed and feisty, not their favourite. The wolves of sea move on in search of an easier quarry. A Weddell seal, that's better. These are more docile and easier to tackle. The part stays close together and travels silently. This time they unleash a far more powerful wave and with astonishing accuracy. These big waves are not intended to break the ice but to knock the prey into the water and they rarely fail.
经过整个冬天日光的沐浴, 海上漂动着浮冰
注:听力文本来源于普特