President Bush Participates in Roundtable Meeting on Economy THE PRESIDENT: I am honored to be with you all. Thank you very much for hosting this meeting here, and the good folks from Alexandria and P
So this one is a quadcopter. 这是一个四轴飞行器。 It's a small model helicopter. In a way, it's a toy, no? 一个小型的直升机模型。差不多是个玩具吧。 And so this one was military technology a few years ago, and now it's open-source,
