关注微信领¥50

百门课程¥0元


50万+已关注

科学美国人60秒:道路噪音与鸟类生存-托福听力下载

2016-11-18 15:36:03来源:网络

点击查看>>科学美国人60秒音频:道路噪音与鸟类生存

  科学美国人60秒中英文翻译:道路噪音与鸟类生存

  科学美国人60秒英文文本

  This is Scientific American — 60-Second Science. I'm Jason Goldman.

  [Songbird and traffic noise]

  It's hard to be a bird in our human-dominated world.

  You can barely hear yourself sing, let alone hear the songs of your friends... and you can forget about hearing a predator. Noise is almost everywhere. Especially noise from traffic. A whopping 83 percent of the surface of the continental U.S. is within just one kilometer of a road.

  Researchers have tried to assess the impact of road noise on animals by, understandably, looking at animals living near noisy roads. The problem is that noisy roads are both noisy, and well, they're roads. It's hard to separate the two.

  "And so we figured out a way to have just the noise without any of the other effects of the road, and to do that we ran speakers through a forest where there was no road."

  Chris McClure, a biologist at Boise State University and The Peregrine Fund. He and his team built their audio phantom road at a popular stopover site for birds in Idaho as they fly south for the winter.

  道路噪音.jpg

  While the noise kept lots of birds away, some stuck around. But they had trouble putting on enough weight to fuel the next leg of their migratory journey.

  "They have to fatten up but they also have to not get eaten by a predator. And those two things are in conflict. Because to eat, they have to look down, which means they aren't looking at predators."

  And when it's too loud, they can't hear the alarm calls of other birds. So they have to waste time looking for predators instead of foraging. The study is in the journal Animal Conservation.

  By 2050, it's thought that enough new roads will be built to circle the planet more than 600 times. But there's an easy solution to the noise problem.

  "Lowering speed limits does a lot."

  So next time you're driving through nature, just slow down a little. It's safer for you and the wildlife. And you can enjoy the view a little longer.

  Thanks for listening for Scientific American — 60-Second Science Science. I'm Jason Goldman.

  中文翻译请点击下一页

为你特别匹配的托福超值课程,快速提分先人一步!
  • 托福12月公益课(第2期)

    托福12月公益课(第2期)

    特点:1天1节公益课,讲干货有实力,高效备考,快速突破!

    课时:10小时

    查看详情
  • 【活动价】新东方托福名师在线一对一(体验课)

    【活动价】新东方托福名师在线一对一(体验课)

    适合人群:想体验新东方在线致赢托福1对1辅导冲分课程的同学

    体验课时:30分钟

    查看详情
  • 大学生旗舰直达班 (冲110分)

    【知心托福】大学生旗舰直达班 (冲110分)

    适合人群:托福目标分数110分!

    课时:343

    查看详情
  • 大学生旗舰直达班 (冲100分)

    【知心托福】大学生旗舰直达班 (冲110分)

    适合人群:托福目标分数100分!

    课时:331

    查看详情
  • 大学生旗舰直达班 (冲90分)

    【知心托福】大学生旗舰直达班 (冲90分)

    适合人群:托福目标分数90分!

    课时:310

    查看详情
全部课程>>
单项突破
直播课堂

更多托福课程
新东方25年教学经验沉淀
托福考生必修课
托福考生,高效提分,安心之选

查看详情>>
更多>>
更多课程>>
更多>>
更多内容
更多>>
距结束 : 00 00 00 00

4小时甩掉“Broken English”,直击托福24+

实战经验分享三人成团免费学

口语6大题精讲;16天社群打卡学习&答疑 活动日期 : 2018.11.08-2018.12.13

价格 : ¥69

678人 已报名

查看详情
更多>>
更多公开课>>
更多>>
更多课程>>