So let's say for instance that you're on your way to your best friend's wedding and you're trying to get to the airport and you're stuck in terrible traffic, and you finally arrive at your gate and yo
Hi, everybody. Over the past seven years, we haven't just been recovering from crisis, we've been rebuilding our economy on a new foundation for growth – growth that benefits everybody, not ju
全球变暖是我们目前面临的一个大问题，不过全世界都过分关注二氧化碳，却忽略了另外一个重要的气体——甲烷。 Fred Krupp: Let's launch a satellite to track a threatening greenhouse gas 我们能否发射一颗卫星来追踪威胁地球的温室气体？ We've got a big problem on our hands with global
Favorite My fellow citizens, at this hour American and coalition forces are in the early stages of military operations to disarm Iraq, to free its people and to defend the world from grave danger. &qu
