We recently saw a case where some researchers made the H5N1 avian influenza virus more potent. 我们最近观察到一个案例，发现一些研究员将H5N1禽流感病毒变得更强效。 It already has a 70 percent mortality rate if you get it, but it's ha

比尔•盖茨和夫人梅琳达•盖茨在斯坦福大学2014年毕业典礼上的演讲。整个演讲以“乐观”为主线，强调了他们对科技的乐观态度，以及对世界美好未来的乐观态度。盖茨夫妇轮流讲述了自己的亲身经历和故事，告诉学生应该站在他人的立场上，感同身受那些处境不及自己的人，尽自己所能去帮助那些需要帮助的人，让全世界所有人类同胞都有一样的美好未来。 BILL GATES: Congratulations, class o

Thank you, Katie 感谢凯蒂 and thank you to President Faust, the Fellows of Harvard College, the Board of Overseers 感谢佛斯特校长 哈佛大学部成员 监事会 and all the faculty, alumni, and students who have welcomed me back t

You didn't break it. It's just in a new position, 你没有破坏它，只是让它移到一个新的地方， and that new position can be just as beautiful. 这新的地方也可以是一样美丽。 Now, if you're no longer a traffic cop -- the problem with being a

Would be to talk about something, you know really like juicy Hollywood stuff like... 最好讲一些…… 你们懂的比如好莱坞的花边新闻一类的事 I thought I could talk about me and Russell Crowe getting into arguments on the set of A