英语听力：自然百科 大迁徙 Great Migrations—16

 Finally, they can rest. For another five months, they will cling to this winter refuge, entering a sort of "waking" trance of energy conservation. Until the longer days of spring awaken¹ them again to mate and pass along to the young--their migratory² imperative³, to fill the skies with a sun-spangled yearning⁴ to move, to start the whole glorious impossible journey once again. 

 

On the other side of the world, another spectacular generation of nomads⁵ is about to hatch. Over the next three weeks, the red crab⁶ eggs will drift in the perilous⁷ nursery of the Indian Ocean and morph into larvae⁸. Most years, the larvae never make it home, swept away by ocean currents or devoured⁹ by fish. But once or twice every decade, a confluence¹⁰ of mild weather and scarce predators¹¹ gives birth to a moving miracle. 

 

By the millions, they pour over the beaches of their birth like a living pink tide. They shed their larval casing becoming air breathers and retrace¹² their parents' tortuous¹³ course guided only by instincts encoded deep in their DNA¹⁴. From this moment on, they are migrants, compelled to move, no matter what.

1 awaken   

vi.醒，觉醒；vt.唤醒，使觉醒，唤起，激起

参考例句：

• Old people awaken early in the morning.老年人早晨醒得早。
• Please awaken me at six.请于六点叫醒我。

2 migratory   

n.候鸟，迁移

参考例句：

• Many migratory birds visit this lake annually.许多候鸟每年到这个湖上作短期逗留。
• This does not negate the idea of migratory aptitude.这并没有否定迁移能力这一概念。

3 imperative   

n.命令，需要；规则；祈使语气；adj.强制的；紧急的

参考例句：

• He always speaks in an imperative tone of voice.他老是用命令的口吻讲话。
• The events of the past few days make it imperative for her to act.过去这几天发生的事迫使她不得不立即行动。

4 yearning   

a.渴望的；向往的；怀念的

参考例句：

• a yearning for a quiet life 对宁静生活的向往
• He felt a great yearning after his old job. 他对过去的工作有一种强烈的渴想。

5 nomads   

n.游牧部落的一员( nomad的名词复数 )；流浪者；游牧生活；流浪生活

参考例句：

• For ten years she dwelled among the nomads of North America. 她在北美游牧民中生活了十年。
• Nomads have inhabited this region for thousands of years. 游牧民族在这地区居住已有数千年了。 来自《简明英汉词典》

6 crab   

n.螃蟹，偏航，脾气乖戾的人，酸苹果；vi.捕蟹，偏航，发牢骚；vt.使偏航，发脾气

参考例句：

• I can't remember when I last had crab.我不记得上次吃蟹是什么时候了。
• The skin on my face felt as hard as a crab's back.我脸上的皮仿佛僵硬了，就象螃蟹的壳似的。

7 perilous   

adj.危险的，冒险的

参考例句：

• The journey through the jungle was perilous.穿过丛林的旅行充满了危险。
• We have been carried in safety through a perilous crisis.历经一连串危机，我们如今已安然无恙。

8 larvae   

n.幼虫

参考例句：

• Larvae are parasitic on sheep.幼虫寄生在绵羊的身上。
• The larvae prey upon small aphids.这种幼虫以小蚜虫为食。

9 devoured   

吞没( devour的过去式和过去分词 )； 耗尽； 津津有味地看； 狼吞虎咽地吃光

参考例句：

• She devoured everything she could lay her hands on: books, magazines and newspapers. 无论是书、杂志，还是报纸，只要能弄得到，她都看得津津有味。
• The lions devoured a zebra in a short time. 狮子一会儿就吃掉了一匹斑马。

10 confluence   

n.汇合，聚集

参考例句：

• They built the city at the confluence of two rivers.他们建造了城市的汇合两条河流。
• The whole DV movements actually was a confluence of several trends.整个当时的DV运动，实际上是几股潮流的同谋。

11 predators   

n.食肉动物( predator的名词复数 )；奴役他人者（尤指在财务或性关系方面）

参考例句：

• birds and their earthbound predators 鸟和地面上捕食它们的动物
• The eyes of predators are highly sensitive to the slightest movement. 捕食性动物的眼睛能感觉到最细小的动静。 来自《简明英汉词典》

12 retrace   

v.折回；追溯，探源

参考例句：

• He retraced his steps to the spot where he'd left the case.他折回到他丢下箱子的地方。
• You must retrace your steps.你必须折回原来走过的路。

13 tortuous   

adj.弯弯曲曲的，蜿蜒的

参考例句：

• We have travelled a tortuous road.我们走过了曲折的道路。
• They walked through the tortuous streets of the old city.他们步行穿过老城区中心弯弯曲曲的街道。

14 DNA   

(缩)deoxyribonucleic acid 脱氧核糖核酸

参考例句：

• DNA is stored in the nucleus of a cell.脱氧核糖核酸储存于细胞的细胞核里。
• Gene mutations are alterations in the DNA code.基因突变是指DNA密码的改变。