SSS 2011-02-11
时间：2019-01-08 作者：英语课 分类：Scientific American(二)月
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 crunched 1 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 oases 2 are more than just a pretty place.
People on the other end of the age spectrum 3 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 tightening 4 should think twice about cutting parks to cut the budget fat. Because parks cut our actual fat.
- 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
- 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
- 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。
- 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。