April 16, 2007 4:01 P.M. EDT THE PRESIDENT: Our nation is shocked and saddened by the news of the shootings at Virginia Tech today. The exact total has not yet been confirmed, but it appears that more

As a conceptual artist, 作为一位概念派艺术家， I'm constantly looking for creative ways to spark challenging conversations. 我经常寻求创新的方式，通过绘画、雕塑、视频和表演 I do this through painting, sculpture, video and performan

Almost three weeks ago in Syria, more than 1,000 innocent people-including hundreds of children-were murdered in the worst chemical weapons attack of the 21st century. And the United States has presen

背景知识 日本由1931年起，在亚洲进行军国主义扩张活动，到1939年，日本已侵占大部分中国领土，并准备挥军东南亚国家，攫取这些地区的天然资源。1940年，日本和德国、意大利组成轴心国，与英法为首的同盟国对垒。 欧洲陷于二次世界大战的战火中，但美国仍然不想卷入战争，只对日采取石油禁运，并希望透过谈判，劝阻日本的侵略行动。不过日本决定先发制人，在1941年12月7日，派出海空军部队，突袭美国位于夏威

Now, we're headed towards a world where robots are everywhere. 我们正迈入一个机器人无处不在的社会。 Robotic technology is moving out from behind factory walls. 机器人科技正在走出工厂的围墙。 It's entering workplaces, households. 它们正在