If you don't know that somebody should've taught you that in the 6th Grade or the 4th Grade or the 1st Grade or somewhere.

如果你不知道,那你们肯定是忘了,在六年级或四年级的时候老师肯定讲过,或者一年级,无所谓具体什么时候

耶鲁公开课 - 美国内战与重建课程节选

And on the 6th of May, Roger Bannister does it.

但在五月六日，Roger，Bannister特做到了。

哈佛公开课 - 幸福课课程节选