你可能只是这个世界上的一个人，但对于某人来说，你就全世界！

You may only be a person in this world, But for someone, You are the world.

youdao

然后就跟全世界分享你的意见。

Then share your expertise with the world!

youdao

你可以怪尼古拉•萨科奇。 仅因为他一个人的不足，就改变了全世界对法国男人的看法。

You can probably blame Nicolas Sarkozy for that, he has single-handedly changed the perception of how the world sees French men.

youdao

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