This is the last question we'll see in class on the photoelectric effect, so hopefully we can have a very high success rate here to show we are all ready to move on with our lives here.

这是这个课上最后一个关于,光电效应的问题，所以希望,你们能有个高的通过率,来证明我们已经可以继续往下走。

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In the Latin American and Caribbean region, 60 million people were lifted from poverty between 2002-2008 and a growing middle class boosted import volumes at an annual rate of 15 percent.

在2002到2008年间，拉丁美洲和加勒比地区有2000万人脱贫，不断壮大的中产阶级推动进口贸易额每年的增长达到15%。

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The exchange rate is passed in from outside the class. It is not constructed inside the class.

汇率是从这个类之外传递进来的，并不是在类内部构造的。

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This is the last question we'll see in class on the photoelectric effect, so hopefully we can have a very high success rate here to show we are all ready to move on with our lives here.

这是这个课上最后一个关于,光电效应的问题，所以希望,你们能有个高的通过率,来证明我们已经可以继续往下走。

麻省理工公开课 - 化学原理课程节选

The city's middle-class unemployment rate is 6.2%, three times higher than it was in 2008, the report said.

WSJ: Quinn Address Aims at Middle Class

Another way to look at it is that nonsmokers in the highest social class have a higher rate of obesity (13.3%) than smokers in the lowest social class (13.1%).

FORBES: Smoking Reduces Obesity

Their aim is to devise a tool that measures the attention of students, taking into account how they rate the class and how alert they are.

FORBES: International Backgrounds Shape Education Entrepreneurs