But should President Obama president have put down to let 2011 the date as the date of the begining of the withdrawl of American presence?

奥巴马总统是不是应该确定,2011年开始撤出美国势力？

普林斯顿公开课 - 国际座谈会课程节选

So it's becoming much more sophisticated, much more interesting and the interesting thing about it is that it verifies a lot of the research that has been done to date with far less sophisticated means, such as self-rapport.

手段更成熟，更有趣，有趣的是,它验证了许多至今通过不全面的方法,所完成的研究的正确性，像自我评估。

哈佛公开课 - 幸福课课程节选