奥巴马每周电视讲话:总统在阵亡将士纪念日向为国捐躯的英雄们致敬 Hi, everybody. 大家好。 This week, I've been speaking about America's national security—our past, our present, and our future. 本周我想谈谈美国国家安全的过去，现在以及未来。 On Thursday, I outlined the future of our fig 英语演讲 2020-09-19 hisen
