I thank you for that." We leave you with these words from another one of the friends, Nancy Lang.

VOA: special.2010.02.08

It's quiet, it's warm, Now imagine you're born deaf, you cannot hear, you cannot communicate by spoken words with your friends and family.

四周一片寂静，温暖，再来假设你自幼失聪，不能和家人，朋友用语言交流。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选