Within 20 degrees of separation from you initial smile to the three people, the entire world will be smiling.

只需要20度的分隔,从你用笑容感染三个人开始，全世界就会笑起来。

哈佛公开课 - 幸福课课程节选

What you see is a kind of cultural unity, first of all, within the Mycenaean world itself.

你看到的是一种文化的统一体,首先,在迈锡尼文明内部文化就是统一的

耶鲁公开课 - 古希腊历史简介课程节选

Depending on what you call external and internal environment, this path that I'm tracing here, deep within your digestive system, is really directly connected to the outside world through both ends.

基于你们所谓的外环境和内环境,我在这里我所指的消化系统内部通路,它的两端确实与外界环境直接相通

耶鲁公开课 - 生物医学工程探索课程节选

Within very little time, the whole world will be made to feel better.

只需要很短的时间，整个世界都会感觉更加美好。

哈佛公开课 - 幸福课课程节选