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SSS 2010-07-09

时间:2010-08-05 06:30来源:互联网 提供网友:konicaqq   字体: [ ]
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    (单词翻译:双击或拖选)

City planners and citizens alike frequently push for better public transportation. They argue that it can lessen1 traffic and reduce emissions2 from cars. Now there’s a new reason to be gung-ho about public transit3—it helps make people skinnier. That’s according to a study published in the August issue of the American Journal of Preventive Medicine.

Researchers surveyed communities in Charlotte, North Carolina. One survey was done before the city had finished building a new light rail system, and the second was done from 12 to 18 months after the rail’s completion. They asked about the residents’ level of physical activity, body mass and use of public transportation before and after the light rail.

Turns out that people who started using light rail to commute4 had a significant average weight loss over that time—equivalent to about six and a half pounds for a five-foot-five person. The users were also 81 percent less likely to become obese5 over the time scale surveyed.

The researchers say that an environment based on mass transit influences health, because rail users get exercise walking to and from stops. And since illness is costly6, here’s another way public transit saves money.

Thanks for the minute for Scientific American’s 60-Second Science. I’m Cynthia Graber


点击收听单词发音收听单词发音  

1 lessen 01gx4     
vt.减少,减轻;缩小
参考例句:
  • Regular exercise can help to lessen the pain.经常运动有助于减轻痛感。
  • They've made great effort to lessen the noise of planes.他们尽力减小飞机的噪音。
2 emissions 1a87f8769eb755734e056efecb5e2da9     
排放物( emission的名词复数 ); 散发物(尤指气体)
参考例句:
  • Most scientists accept that climate change is linked to carbon emissions. 大多数科学家都相信气候变化与排放的含碳气体有关。
  • Dangerous emissions radiate from plutonium. 危险的辐射物从钚放散出来。
3 transit MglzVT     
n.经过,运输;vt.穿越,旋转;vi.越过
参考例句:
  • His luggage was lost in transit.他的行李在运送中丢失。
  • The canal can transit a total of 50 ships daily.这条运河每天能通过50条船。
4 commute BXTyi     
vi.乘车上下班;vt.减(刑);折合;n.上下班交通
参考例句:
  • I spend much less time on my commute to work now.我现在工作的往返时间要节省好多。
  • Most office workers commute from the suburbs.很多公司的职员都是从郊外来上班的。
5 obese uvIya     
adj.过度肥胖的,肥大的
参考例句:
  • The old man is really obese,it can't be healthy.那位老人确实过于肥胖了,不能算是健康。
  • Being obese and lazy is dangerous to health.又胖又懒危害健康。
6 costly 7zXxh     
adj.昂贵的,价值高的,豪华的
参考例句:
  • It must be very costly to keep up a house like this.维修这么一幢房子一定很昂贵。
  • This dictionary is very useful,only it is a bit costly.这本词典很有用,左不过贵了些。
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