SSS 2008-06-03
时间：2019-01-08 作者：英语课 分类：Scientific American(六)月
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 radar 1 was developed. Anxious Military Official sounded false alarms over phantom 2 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 Bowling 3 Green State University put microphones on top of buildings in northern Ohio to record nighttime flybys. Birds use a chain of islands to hop 4 form Ohio across Lake Erie, to Canadian breeding grounds. Ross wants to know if proposed wind-power farms might interfere 5.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.
- 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。
- 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。
- 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？
- 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？