美国互联网用户平均年龄42，Twitter用户平均年龄39。 Tags: 4 comments 2 likes 0 shares Share this: 李開復 Kai-Fu Lee About author not provided AI Expert, CEO of 创新工场 (Sinovation Ventures), former President of Google China. Author of AI 438095 followers 402712 likes "http://www.aisuperpowers.com/" View all posts