可引用的發言段落Citable transcript turn#309894講者:Speaker: Audience MemberI was thinking about what we read about you earlier, how one of the first things that you designed or invented was something that would help your younger sibling with fractions. 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 record2019-07-22 Henry Luce Foundation visits