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英语听力：探索发现 2013-03-10 猛玛象进城记 Mammoths to Manhattan—18

时间：2014-01-27 07:46:16

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（单词翻译）

 This mass roosting takes place soon after the summer nesting season. It’s a chance for the birds to molt1 before they fly south for the winter. As Vaux’s swift numbers reach a peak in mid2 September, they attract attention from the locals. Coopers hawks3 and peregrines pluck a meal from the tumbling mass of birds. In as little as 20 minutes, as many as 40,000 swifts pack into the chimney for the night.

 
While a Portland chimney has become a substitute for a tree, another roosting creature has chosen a road bridge in Austin, Texas as its cave. Visitors to Austin have to wait till evening for a glimpse of what lurks4 within the bridge. 
 
As the sun goes down, Mexican free-tailed bats begin a breath-taking commute5 out of the city. This exodus6 only takes place in summer. Free-tailed bats arrive in Texas for the spring, returning to Mexico for the winter. More than a million of them leave the city at dusk and head into surrounding countryside to feed on insects. The sky over Austin swarms7 with these aerial commuters.

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1 molt Rj9yb     
n.换毛，脱皮，换毛期
参考例句：
  • The fourth time they molt,they change into pupae.换第四次皮时，它们蜕变成蛹。
  • This veterinary product is very effective in preventing animal molt.这种兽药对于防治兽类掉毛很有效。
2 mid doTzSB     
adj.中央的，中间的
参考例句：
  • Our mid-term exam is pending.我们就要期中考试了。
  • He switched over to teaching in mid-career.他在而立之年转入教学工作。
3 hawks c8b4f3ba2fd1208293962d95608dd1f1     
鹰( hawk的名词复数 )； 鹰派人物，主战派人物
参考例句：
  • Two hawks were hover ing overhead. 两只鹰在头顶盘旋。
  • Both hawks and doves have expanded their conditions for ending the war. 鹰派和鸽派都充分阐明了各自的停战条件。
4 lurks 469cde53259c49b0ab6b04dd03bf0b7a     
n.潜在，潜伏；（lurk的复数形式）vi.潜伏，埋伏（lurk的第三人称单数形式）
参考例句：
  • Behind his cool exterior lurks a reckless and frustrated person. 在冷酷的外表背后，他是一个鲁莽又不得志的人。 来自《简明英汉词典》
  • Good fortune lies within Bad, Bad fortune lurks within good. 福兮祸所倚，祸兮福所伏。 来自互联网
5 commute BXTyi     
vi.乘车上下班；vt.减(刑)；折合；n.上下班交通
参考例句：
  • I spend much less time on my commute to work now.我现在工作的往返时间要节省好多。
  • Most office workers commute from the suburbs.很多公司的职员都是从郊外来上班的。
6 exodus khnzj     
v.大批离去，成群外出
参考例句：
  • The medical system is facing collapse because of an exodus of doctors.由于医生大批离去，医疗系统面临崩溃。
  • Man's great challenge at this moment is to prevent his exodus from this planet.人在当前所遇到的最大挑战，就是要防止人从这个星球上消失。
7 swarms 73349eba464af74f8ce6c65b07a6114c     
蜂群，一大群( swarm的名词复数 )
参考例句：
  • They came to town in swarms. 他们蜂拥来到城里。
  • On June the first there were swarms of children playing in the park. 6月1日那一天，这个公园里有一群群的孩子玩耍。

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