奥巴马每周电视讲话:总统呼吁维护世界和平与安全 远离核恐怖主义
Hi, everybody. This week, I'm speaking to you from our Nuclear Security Summit. I welcomed more than 50 leaders from around the world to make sure we're working together to meet one of the greatest threats to global security—terrorists getting their hands on a weapon of mass destruction, like a nuclear weapon. 大家好！本周，我在核安全峰会会场向大家讲话。在这里，我与...