THE PRESIDENT: Good morning. This week, millions of Americans gather with loved ones for Christmas. This is a season of hope and joy. And it is an occasion to remember a humble birth that has helped s
英语演讲稿-01 Hello, everyone. My name is Lois. I'm 12 years old. I'm from Weifang, China. I can speak English and Chinese. And I can sing English songs. I like reading. There are lots of books in my hom
September 24, 2007 9:52 A.M. EDT THE PRESIDENT: Thank you all. Please be seated. I've spoken to a lot of people in this room, but rarely have I spoken to a group of people who I can address, Mr. Presi
But personal DNA machines can also save human lives. 但个人DNA检测器还可以挽救人类的生命。 Professor Ian Goodfellow is a virologist at the University of Cambridge. Ian Goodfellow教授是剑桥大学的病毒学家。 Last year he traveled to
