奥巴马每周电视讲话:总统呼吁为每个学生创造机会 掌握计算机技能 Hi everybody. As I said in my State of the Union address, we live in a time of extraordinary change-change that's affecting the way we live and the way we work. New technology replaces any job whe 英语演讲 2020-08-20 hisen
