(单词翻译:单击)
听力文本
According to a new study, if America's children saw even just a slight increase in physical activity billions of dollars could be saved in medical costs.
根据一项新的研究，如果美国儿童的体育活动略有增加，那么可以节省数十亿美元的医疗费用。
The study's lead researcher, Dr. Bruce Lee says,
该研究的主要研究者李小龙博士表示，
"Physical activity not only makes kids feel better and helps them develop healthy habits, it's also good for the nation's bottom line."
“体育锻炼不仅能让孩子感觉更好，帮助他们养成健康的习惯，而且对国家的底线也有好处。”
Through the use of federal government data, researchers determined how an increase in physical activity for 8 to 11 year-olds could affect their entire lives.
通过联邦政府的数据，研究人员确定8岁至11岁儿童增加体育活动会影响他们整个人生。
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词汇解析
1、bottom line
最重要的因素；要旨
The bottom line is that it's not profitable.
最重要的一点是它无利可图。
The bottom line is that it did not get the best out of everybody.
最关键的问题是这不能使每个人充分发挥自己的长处。
（公司在一段时期内的）盈亏总额，账本底线
These small promotions were costly and they did nothing to increase his bottom line.
这些小规模的促销活动成本很高，而且对增加他的最终效益没什么贡献。
to force chief executives to look beyond the next quarter's bottom line.
迫使主管们将目光不要仅局限于下一个季度的盈亏
2、develop
发展;成长;发育;生长
As children develop, some of the most important things they learn have to do with their sense of self.
在成长过程中，孩子学到的一些最重要的东西与他们的自我意识有关。
It's hard to say at this stage how the market will develop.
在现阶段，很难说市场将会如何发展。
(问题或困难)出现，产生
A huge row has developed about the pollution emanating from a chemical plant.
一家化工厂造成的污染已经引发了激烈争论。
blood clots in his lungs, a problem which developed from a leg injury.
由腿伤引起的他肺部的血块
