英语听力：自然百科 冰冻星球 前往地球尽头—15

 The randoms of the sea ice are occupied by sun- bathing seals that have been here all winter. But the new arrivals're following the retreating ice edge and they have come here to hunt. Killer¹ whales, the oceans'  top predator². Killers³ are like wolves, for they will hunt animals far larger than themselves. But even smaller prey⁴ are a problem, if you can't reach them. The solution is teamwork. Swimming in perfect formation, they flick⁵ their tail in unison⁶ and create a wave that cracks the ice. They regroup and access the damage. 

 

A more powerful wave is needed. The ice float is breaking up. Now they are close enough to get a good look at their target. The seal is a crabeater , sharp to stand feisty, not their favorite. The wolves of the sea move on in search of easier quarry⁷. A weddell seal. That is better. These are more docile⁸ and easier to tackle. The pardon stay is close together and travels silently. This time they initiate⁹ far more powerful wave and with astonishing accuracy. These big whales are not intended to break the ice, but to knock the prey into the water and they rarely fail.

1 killer   

n.杀人者，杀人犯，杀手，屠杀者

参考例句：

• Heart attacks have become Britain's No.1 killer disease.心脏病已成为英国的头号致命疾病。
• The bulk of the evidence points to him as her killer.大量证据证明是他杀死她的。

2 predator   

n.捕食其它动物的动物；捕食者

参考例句：

• The final part of this chapter was devoted to a brief summary of predator species.本章最后部分简要总结了食肉动物。
• Komodo dragon is the largest living lizard and a fearsome predator.科摩多龙是目前存在的最大蜥蜴，它是一种令人恐惧的捕食性动物。

3 killers   

凶手( killer的名词复数 )； 消灭…者； 致命物； 极难的事

参考例句：

• He remained steadfast in his determination to bring the killers to justice. 他要将杀人凶手绳之以法的决心一直没有动摇。
• They were professional killers who did in John. 杀死约翰的这些人是职业杀手。

4 prey   

n.被掠食者，牺牲者，掠食；v.捕食，掠夺，折磨

参考例句：

• Stronger animals prey on weaker ones.弱肉强食。
• The lion was hunting for its prey.狮子在寻找猎物。

5 flick   

n.快速的轻打，轻打声，弹开；v.轻弹，轻轻拂去，忽然摇动

参考例句：

• He gave a flick of the whip.他轻抽一下鞭子。
• By a flick of his whip,he drove the fly from the horse's head.他用鞭子轻抽了一下，将马头上的苍蝇驱走。

6 unison   

n.步调一致，行动一致

参考例句：

• The governments acted in unison to combat terrorism.这些国家的政府一致行动对付恐怖主义。
• My feelings are in unison with yours.我的感情与你的感情是一致的。

7 quarry   

n.采石场；v.采石；费力地找

参考例句：

• Michelangelo obtained his marble from a quarry.米开朗基罗从采石场获得他的大理石。
• This mountain was the site for a quarry.这座山曾经有一个采石场。

8 docile   

adj.驯服的，易控制的，容易教的

参考例句：

• Circus monkeys are trained to be very docile and obedient.马戏团的猴子训练得服服贴贴的。
• He is a docile and well-behaved child.他是个温顺且彬彬有礼的孩子。

9 initiate   

vt.开始，创始，发动；启蒙，使入门；引入

参考例句：

• A language teacher should initiate pupils into the elements of grammar.语言老师应该把基本语法教给学生。
• They wanted to initiate a discussion on economics.他们想启动一次经济学讨论。