Do I go out to Harvard yard and take a random sample ? of sophomores to study meditation?

是不是可以在哈佛大二学生里随机抽样,来研究冥想？

哈佛公开课 - 幸福课课程节选

Then that's not a very long distance, probably easily walkable in a few minutes; but that child can't be walking through everybody's yard.

他们离得不远,可能走几分钟就到了,但是你的孩子却不能直接走到他的朋友家

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选