Hi guys, Welcome to the Advanced Video Search Engine, and you are watching 美篇：哈佛大學公開課：一杯水的故事，看完你就放下了. That video is uploaded by 美篇 at 2019-11-18T23:07:51-08:00. We are promoting this video only for entertainment and educational purpose only. So, I hope you like & enjoy it. [Fm2pQdp7RFg]