(a) The definition fails to distinguish an aerospace object from other objects such as meteorites; an aerospace object can be subject to human control at any altitude with regard to its direction and speed;
(a) 该定义没有将航空航天物体与诸如流星等其他物体区分开来；航空航天物体可以在任何高度以任何方向和速度由人加以控制；