In one study, researchers examined the pages of five hundred eighteen-year-olds from the United States.

VOA: special.2009.02.18

So this MAPP program is a one calendar year, full-time study.

本课程是一年制全日制学习。

哈佛公开课 - 幸福课课程节选

And some do it better than others. One measure of success is the five-year survival rate, and the lead author of a new study says that number varied dramatically among the different medical centers doing lung transplants.

VOA: standard.2010.07.14