英语 英语 日语 日语 韩语 韩语 法语 法语 德语 德语 西班牙语 西班牙语 意大利语 意大利语 阿拉伯语 阿拉伯语 葡萄牙语 葡萄牙语 越南语 越南语 俄语 俄语 芬兰语 芬兰语 泰语 泰语 泰语 丹麦语 泰语 对外汉语

SSS 2008-06-03

时间:2010-05-14 01:49来源:互联网 提供网友:0922013129   字体: [ ]
特别声明:本栏目内容均从网络收集或者网友提供,供仅参考试用,我们无法保证内容完整和正确。如果资料损害了您的权益,请与站长联系,我们将及时删除并致以歉意。
    (单词翻译:双击或拖选)

This is Scientific American’s 60-Second Science. I’m Steve Mersky. Got a minute?

You probably missed it because you were sleeping. But one of North America's great natural phenomenon happened over the nights of mid-spring. After sundown, the skies filled with millions of birds all traveling nighttime legs of their journey north. These overnight flyways were discovered during World War 2 when Doppler radar1 was developed. Anxious Military Official sounded false alarms over phantom2 air raids but soon realized they were just watching flocks of songbirds. There were calls that each species only makes during this night  flights. This spring Jeremy Ross from Bowling3 Green State University put microphones on top of buildings in  northern Ohio to record nighttime flybys. Birds use a chain of islands to hop4 form Ohio across Lake Erie, to Canadian breeding grounds. Ross wants to know if   proposed wind-power farms might interfere5.Using the volume of each call Ross can calculate if birds are soaring safely above the blades of wind turbines. Something to consider with more wind power in the air.

Thanks for the minute for Scientific American’s 60-Second Science. I'm Steve Mersky.


点击收听单词发音收听单词发音  

1 radar kTUxx     
n.雷达,无线电探测器
参考例句:
  • They are following the flight of an aircraft by radar.他们正在用雷达追踪一架飞机的飞行。
  • Enemy ships were detected on the radar.敌舰的影像已显现在雷达上。
2 phantom T36zQ     
n.幻影,虚位,幽灵;adj.错觉的,幻影的,幽灵的
参考例句:
  • I found myself staring at her as if she were a phantom.我发现自己瞪大眼睛看着她,好像她是一个幽灵。
  • He is only a phantom of a king.他只是有名无实的国王。
3 bowling cxjzeN     
n.保龄球运动
参考例句:
  • Bowling is a popular sport with young and old.保龄球是老少都爱的运动。
  • Which sport do you 1ike most,golf or bowling?你最喜欢什么运动,高尔夫还是保龄球?
4 hop vdJzL     
n.单脚跳,跳跃;vi.单脚跳,跳跃;着手做某事;vt.跳跃,跃过
参考例句:
  • The children had a competition to see who could hop the fastest.孩子们举行比赛,看谁单足跳跃最快。
  • How long can you hop on your right foot?你用右脚能跳多远?
5 interfere b5lx0     
v.(in)干涉,干预;(with)妨碍,打扰
参考例句:
  • If we interfere, it may do more harm than good.如果我们干预的话,可能弊多利少。
  • When others interfere in the affair,it always makes troubles. 别人一卷入这一事件,棘手的事情就来了。
本文本内容来源于互联网抓取和网友提交,仅供参考,部分栏目没有内容,如果您有更合适的内容,欢迎点击提交分享给大家。
------分隔线----------------------------
TAG标签:   SSS  alarm
顶一下
(2)
100%
踩一下
(0)
0%
最新评论 查看所有评论
发表评论 查看所有评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
验证码:
听力搜索
推荐频道
论坛新贴