這是真正的“空中”教室，他們在宇宙空間站接受學(xué)生來自地球的提問
"Good morning, Discovery Center -- good afternoon. We're happy to be here with you. This is Al Drew, Clay Anderson, Dave Williams and I'm Barb Morgan. And we are ready for your first question. Welcome aboard the International Space Station." That was teacher-turned-astronaut Barbara Morgan, speakin…