课程咨询

托福考试网 托福资料下载 托福资讯 0元讲座 水平测试

托福考试练习
新东方在线 > TOEFL > 托福听力 > 正文
托福培训

扫码免费领资料

内含托福全科备考资料

更有免费水平测试及备考规划

托福培训

扫码关注掌握一手留学资讯

回复XDF免费水平测试

录播精讲 直播课HOT

托福听力练习-科学美国人60秒:迁徙鸟类偏爱湖畔

2017-03-03 15:50:00来源：科学美国人60秒

点击查看>>科学美国人60秒音频：迁徙鸟类偏爱湖畔

　　科学美国人60秒中英文翻译：_______

　　科学美国人60秒英文文本

　　This is Scientific American — 60-Second Science. I'm Christopher Intagliata.

　　You may have spotted V-shaped squadrons of geese heading south this fall. But for many migrants—like smaller songbirds—nighttime is the right time, when it comes to migration. Winds are gentler. And darkness helps them avoid airborne attacks. Of course darkness also makes it harder for us to see them. Which is where weather radar comes in.

　　"These radars were designed to detect water drops in the air, precipitation in the air." Jeff Buler, an ornithologist and aeroecologist at the University of Delaware. "They also detect any other large object that will reflect back radio energy. It essentially sees insects and bats and birds as large drops of water."

　　Buler and his team used three weather surveillance radars to track migratory birds near the Great Lakes—observing four spring migrations in a row. And what they found was, as the night migration ended, and dawn broke, many birds in flight over the lakes turned back. Decided to quit for the day. Which meant crowded real estate on the south shore of the lakes, as the birds piled up there to wait out the day. The study is in the journal The Auk.

　　The message for conservators? "Restoring one hectare of forest along the shoreline of Lake Michigan might be able to support more migrants than a hectare of forest 50 km away from the shoreline." Because birds—just like humans—like that lakefront property.

　　Thanks for listening for Scientific American — 60-Second Science Science. I'm Christopher Intagliata.

　　中文翻译请点击下一页

本文关键字: 托福听力练习 科学美国人60秒

上一页 1 2 下一页

托福辅导

关注新东方在线托福

托福机经·Official题目练习

考前重点突破·听说读写海量资料

更多资料

关注新东方在线托福，
回复【XDF】获取大礼包

托福辅导
  • 1.打开手机微信【扫一扫】，识别上方二维码；
  • 2.点击【添加】，回复对应关键字领取学习资料。
更多>>
更多内容

免费获取托福备考大礼包

微信扫描下方二维码 立即领取

托福辅导
更多>>
更多公益讲座>>
更多>>
更多资料
托福TPO 托福听力练习 托福口语练习 托福阅读练习 托福写作练习
我要
反馈 返回
首页
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10