And lastly, here's Destin, from "Smarter Every Day," 最后是《每天聪明一点点》的德斯丁， talking about the conservation of angular momentum, and, since it's YouTube, cats: 为我们讲述动量守恒，由于是在YouTube上，所以他用猫来举例： Hey, it's me,
Hi everybody. On Thursday, I traveled to Pittsburgh for the White House Frontiers Conference, 大家好。周四,我来到匹斯堡参加白宫前沿大会。 where some of America's leading minds came together 在那里,一些美国的领袖人物聚在一起, to talk abou
Good afternoon, ladies and gentlemen: My topic today is “The Internet Will Become More Popular.” The Internet, which was unfamiliar to human beings is totally accepted by most of people. E
