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SSS 2011-02-11

时间:2011-03-04 03:50来源:互联网 提供网友:yw7514   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute.

Ahhh, the great outdoors. Great for your health, too. Because studies suggest that the more we visit local parks, the more fit we are.

Researchers at Penn State crunched1 the numbers from a variety of studies, for a report they prepared for the National Recreation and Park Association.

In a five-city survey, 38 percent of people over 50-years-old said they used a park at least once a week. So these oases2 are more than just a pretty place.

People on the other end of the age spectrum3 benefit too. One study showed that adolescent girls do 17 more minutes of moderate-to-vigorous physical activity every week for each park within a half mile of home. And each additional $10 per person that the government invests in parks and recreation was associated with a third-of-a-day more vigorous exercise by girls every week. Such state spending also drove more strength-building exercise for boys and girls.

All of which should prevent some of the more than $8,000 per year of health care costs per person. So officials looking to do some belt tightening4 should think twice about cutting parks to cut the budget fat. Because parks cut our actual fat.


点击收听单词发音收听单词发音  

1 crunched adc2876f632a087c0c8d7d68ab7543dc     
v.嘎吱嘎吱地咬嚼( crunch的过去式和过去分词 );嘎吱作响;(快速大量地)处理信息;数字捣弄
参考例句:
  • Our feet crunched on the frozen snow. 我们的脚嘎吱嘎吱地踩在冻雪上。 来自《简明英汉词典》
  • He closed his jaws on the bones and crunched. 他咬紧骨头,使劲地嚼。 来自英汉文学 - 热爱生命
2 oases ba47325cf78af1e5010defae059dbc4c     
n.(沙漠中的)绿洲( oasis的名词复数 );(困苦中)令人快慰的地方(或时刻);乐土;乐事
参考例句:
  • There was a hundred miles between the two oases. 这两片绿洲间有一百英里。 来自辞典例句
  • Where underground water comes to the surface, there are oases. 地下水流到地表的地方,就成为了绿洲。 来自互联网
3 spectrum Trhy6     
n.谱,光谱,频谱;范围,幅度,系列
参考例句:
  • This is a kind of atomic spectrum.这是一种原子光谱。
  • We have known much of the constitution of the solar spectrum.关于太阳光谱的构成,我们已了解不少。
4 tightening 19aa014b47fbdfbc013e5abf18b64642     
上紧,固定,紧密
参考例句:
  • Make sure the washer is firmly seated before tightening the pipe. 旋紧水管之前,检查一下洗衣机是否已牢牢地固定在底座上了。
  • It needs tightening up a little. 它还需要再收紧些。
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