"There is still a lot of firsts to do and hopefully we will run out of those firsts pretty quickly because it is certainly my desire that one of the legacies that I would certainly like to leave behind is bringing in more African-American astronauts."

VOA: standard.2010.02.02

And I don't think that we will be completely satisfied when we do leave with what we left behind That's it for today.

我认为我们不会非常满意,当我们走时，看到我们所留下的问题,今天的节目就到此结束了。

普林斯顿公开课 - 国际座谈会课程节选

Can't be detected in terms of its... It doesn't leave traces behind.

检测不到。,是因为它没留下任何的痕迹。

耶鲁公开课 - 死亡课程节选