"There is absolutely no difference in the content of social studies, history,geography,math and science.

VOA: standard.2010.07.12

I'll take this even a step further, even though there is no research about this, I bet you this is correct: there is no difference in our levels of wellbeing if our place of residents is by the river or in the .

我会进一步说明，虽然还没有这方面的研究，我敢和你们打赌，下面的说法是正确的：,我们的幸福水平不会有所不同,不论我们是生活在河边,还是呆在监狱。

哈佛公开课 - 幸福课课程节选