英语听力：2012-02-24 从南极到北极 From Pole To Pole—17

 Their secret is teamwork. Impala are their favourite prey¹. They start to hunt and the pack splits up. An aerial viewpoint gives a new insight into their strategy. As the dogs approach their prey, they peel off to take up separate positions around their target. They seem to form a cordon² around the impala. Moving in total silence, they take up their positions. Those ears can detect the slightest rustle³. 

 

The hunt is on. Three dogs close in on one impala. Missed. The lead dog drives the impala towards the hidden flankers. Anticipating their line, the leader cuts the corner and joins a flanker for the final assault. It’s all or nothing—one on one. The dog has stamina⁴. The impala has speed. Leaping into the lake is an act of desperation—impala 

 

can barely swim.

1 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。

2 cordon   

n.警戒线，哨兵线

参考例句：

• Police officers threw a cordon around his car to protect him.警察在他汽车周围设置了防卫圈以保护他。
• There is a tight security cordon around the area.这一地区周围设有严密的安全警戒圈。

3 rustle   

v.沙沙作响；偷盗(牛、马等)；n.沙沙声声

参考例句：

• She heard a rustle in the bushes.她听到灌木丛中一阵沙沙声。
• He heard a rustle of leaves in the breeze.他听到树叶在微风中发出的沙沙声。

4 stamina   

n.体力；精力；耐力

参考例句：

• I lacked the stamina to run the whole length of the race.我没有跑完全程的耐力。
• Giving up smoking had a magical effect on his stamina.戒烟神奇地增强了他的体力。