这是一项以全国人口为基础的研究。我们发现，在40岁以上患糖尿病的美国人当中，有28.5%(即四百二十万人)同时患有糖尿病性视网膜病变。

This was a national population-based study and we found that among Americans with diabetes who were age 40 and older, that 28.5 percent - or 4.2 million people - have diabetic retinopathy.

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将建立一项全国低碳燃料标准（National Low Carbon Fuel Standard，LCFS），以加速引入低碳非石油燃料。

Would establish a National Low Carbon Fuel Standard (LCFS) to speed the introduction of low-carbon non-petroleum fuels.

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昨天在全国场外交易中，克拉克股票跌$6.125，以$35.625收盘。

In national over-the-counter trading yesterday, Clarcor shares tumbled $6.125 to close at $35.625.

《柯林斯英汉双解大词典》

So we'll take Flaming Hot Cheetos up there, and later in the class I'll play you a very cute clip from NPR about kids eating Flaming Hot Cheetos in schools.

我们以火焰辣奇多为例,稍后我会播一个来自于全国公共广播网的,关于孩子们在学校里吃火焰辣奇多的短片

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选