Hi everyone. I'm Naomi Shah, and today I'll be talking to you about my research involving indoor air quality and asthmatic patients. 大家好，我是劳伦·霍奇，今天我要跟你们讲讲我关于室内空气质量和哮喘病人的研究。 1.6 million deaths worldwid
This afternoon, President Obama addressed the nation from the East Room of the White House, to outline America's response to the situation in Libya. THE PRESIDENT: Good afternoon, everybody. I want to
May 5, 2007 THE PRESIDENT: Good morning. At this hour, America's brave men and women in uniform are engaging our enemies around the world. And in this time of war, our elected officials have no higher
