Charles C. Mann在Ted的演讲，当地球人口超100亿，我们又将如何生存？ Charles C. Mann: How will we survive when the population hits 10 billion? 当地球人口达到100亿时，我们将如何生存 How are we doing? No, no, no, by that, I meant, how are we, h
Obama's Weekly Address WEEKLY ADDRESS: It's Time for Congress to Help the Middle Class 奥巴马每周电视讲话:总统坦言美国当前在伊拉克的行动 This week, I authorized two operations in Iraq. 本周，我授权在伊拉克开展两项行动。 First, I directed our
As many of you know, early on Friday, at least twelve people were killed when a gunman opened fire at a movie heater in Aurora, Colorado. 正如你们很多人了解的那样,早在星期五,一名持枪男子在科罗拉多州奥罗拉电影院开枪致使至少12人死亡。 Dozens more
THE PRESIDENT: Good afternoon, everybody. I just concluded结束，推断 a meeting with members of my national security team, including those from our intelligence, homeland security and law enforcement agenci
In Saskatchewan, as across all of the boreal, 横跨北方森林的萨克其万省， home to some of our most famous rivers, 拥有一些著名湖泊， an incredible network of rivers and lakes that every school-age child learns about, 形成令人叹为
