可引用的發言段落Citable transcript turn#291140講者:Speaker: Ryan ChangYeah, how can you let people use Facebook with just buttons? You go up, down, left, right with each button. How do they scroll? How do they do anything? 逐字稿導覽Transcript navigation查看前後文View context分享此段Share turn來源逐字稿Source record2019-04-17 Ryan Chang visit