SSS 2009-07-17
时间：2019-01-08 作者：英语课 分类：Scientific American(七)月
This is Scientific Ameican’s 60-Second Science. I’m Karen Hopkin. Got a minute?
Horse racing 2 is a sport that's 200 years old. And a day at the track is much more exciting now than it was back then. That's because horses are faster than they used to be. Or are they? A study in the July 17th issue of Science shows that it's the way that jockeys ride that's made racing more heart-pounding than before. Images from the late 1800s show that the boys in silks looked pretty relaxed as they went along for the ride. But modern jockeys-crouching, tightly coiled atop their galloping 3 steeds-actively work to make sure their weight doesn't slow things down. Using GPS to track the riders' motions, scientists found that jockeys move out of phase with their mounts. That means that the horse doesn't have to physically 4 move the jockey through each cyclical stride. As a result, races are five to seven percent faster than they were 100 years ago.
Thanks for the minute, for Scientific Ameican’s 60-Second Science. I’m Karen Hopkin.
- A transcript of the tapes was presented as evidence in court.一份录音带的文字本作为证据被呈交法庭。
- They wouldn't let me have a transcript of the interview.他们拒绝给我一份采访的文字整理稿。
- I was watching the racing on television last night.昨晚我在电视上看赛马。
- The two racing drivers fenced for a chance to gain the lead.两个赛车手伺机竞相领先。