英语听力：自然百科 大迁徙 Great Migrations—11

 It's a grim end to a short life, but many of the surviving calves¹ will face a more terrifying death. 

 

In the Mara River, another migration² is culminating. Crocodiles have memorized when and where the wildebeests will try to cross. They have gathered in massive numbers, waiting, watching and hungering for what's to come. 

 

While the wildebeest migration has converged³ on a small crossroad of terror versus⁴ hunger, the monarch⁵ butterfly migration has spread to fill a continent. The second, third generations of monarchs⁶ have been moving progressively north. They have fanned out across North America, and the migration has reached its tipping point. It's August, time for the super generation to be born and to take the species all the way back to the Mexico. Tattered⁷ females alight, their brilliance⁸ dimmed by the arduous⁹ flight. One by one, the female lays her 200 eggs. She deposits them on the leaves of milkweed, ensuring the hatchlings will have a ready supply of food to fuel the marathon ahead. These new travelers will be different, living 10 times longer than their parents. Only longevity¹⁰ and uncanny endurance can take them back to Mexico, this time, in a single generation.

1 calves   

n.(calf的复数)笨拙的男子，腓；腿肚子( calf的名词复数 )；牛犊；腓；小腿肚v.生小牛( calve的第三人称单数 )；（冰川）崩解；生（小牛等），产（犊）；使（冰川）崩解

参考例句：

• a cow suckling her calves 给小牛吃奶的母牛
• The calves are grazed intensively during their first season. 小牛在生长的第一季里集中喂养。 来自《简明英汉词典》

2 migration   

n.迁移，移居，（鸟类等的）迁徙

参考例句：

• Swallows begin their migration south in autumn.燕子在秋季开始向南方迁移。
• He described the vernal migration of birds in detail.他详细地描述了鸟的春季移居。

3 converged   

v.（线条、运动的物体等）会于一点( converge的过去式 )；（趋于）相似或相同；人或车辆汇集；聚集

参考例句：

• Thousands of supporters converged on London for the rally. 成千上万的支持者从四面八方汇聚伦敦举行集会。
• People converged on the political meeting from all parts of the city. 人们从城市的四面八方涌向这次政治集会。 来自《简明英汉词典》

4 versus   

prep.以…为对手，对；与…相比之下

参考例句：

• The big match tonight is England versus Spain.今晚的大赛是英格兰对西班牙。
• The most exciting game was Harvard versus Yale.最富紧张刺激的球赛是哈佛队对耶鲁队。

5 monarch   

n.帝王，君主，最高统治者

参考例句：

• The monarch's role is purely ceremonial.君主纯粹是个礼仪职位。
• I think myself happier now than the greatest monarch upon earth.我觉得这个时候比世界上什么帝王都快乐。

6 monarchs   

君主，帝王( monarch的名词复数 )

参考例句：

• Monarchs ruled England for centuries. 世袭君主统治英格兰有许多世纪。
• Serving six monarchs of his native Great Britain, he has served all men's freedom and dignity. 他在大不列颠本国为六位君王服务，也为全人类的自由和尊严服务。 来自演讲部分

7 tattered   

adj.破旧的，衣衫破的

参考例句：

• Her tattered clothes in no way detracted from her beauty.她的破衣烂衫丝毫没有影响她的美貌。
• Their tattered clothing and broken furniture indicated their poverty.他们褴褛的衣服和破烂的家具显出他们的贫穷。

8 brilliance   

n.光辉，辉煌，壮丽，（卓越的）才华，才智

参考例句：

• I was totally amazed by the brilliance of her paintings.她的绘画才能令我惊歎不已。
• The gorgeous costume added to the brilliance of the dance.华丽的服装使舞蹈更加光彩夺目。

9 arduous   

adj.艰苦的，费力的，陡峭的

参考例句：

• We must have patience in doing arduous work.我们做艰苦的工作要有耐性。
• The task was more arduous than he had calculated.这项任务比他所估计的要艰巨得多。

10 longevity   

n.长命；长寿

参考例句：

• Good habits promote longevity.良好的习惯能增长寿命。
• Human longevity runs in families.人类的长寿具有家族遗传性。